In her tower called Stony Stem, 20-year-old Orlaith performs her nightly ritual: pricking her finger and placing a crystal goblet of water tinged with her blood in a small door she calls The Safe. She listens as Rhordyn, her guardian, ascends the 148 steps, takes the offering, and departs without speaking. From her balcony, she watches him walk Castle Noir’s perimeter before disappearing into Vateshram Forest.

Back inside, Orlaith notices that her supply of caspun, a sedative she uses against nightmares, is nearly depleted. For the first time in months, she will sleep sober. That night, she suffers a terrifying nightmare of dead bodies, monsters, shrill scratching sounds, and a chasm. Baze, her guard and friend, wakes her and gives her caspun. She reveals that she has been overdosing on the drug as a preventative.

Desperate for comfort, Orlaith begs Baze to stay until morning. He reluctantly agrees. He shares his flask of whiskey, then reveals that he was just with Tanith, Orlaith’s handmaid, and another woman named Halena. He mocks Orlaith’s romance novel before settling in to stay the night despite his concerns about consequences.

Orlaith wakes with a brutal hangover. From her balcony, she sees Rhordyn emerge from the forest carrying a dead stag. Their eyes meet briefly before she retreats inside. Hearing Baze approach, she rushes to prepare. She lifts a hidden stone slab under her rug, revealing jars of Exothryl, a stimulant. She places a node under her tongue to counteract the caspun hangover, then binds her breasts flat with a stretch band before dressing.

Baze enters and returns her repaired wooden sword, declaring there will be no more sleepovers. They proceed to train on a cliff edge overlooking Bitten Bay. Orlaith wears a blindfold to sharpen her other senses. The clashing of their new Petrified Pine swords triggers her trauma, but she endures it. When she complains about the swords, Baze reminds her he once threw her previous sword over her Safety Line—a boundary she refuses to cross—knowing she would not retrieve it.

Baze strikes Orlaith’s knee, causing an injury. The Exothryl makes her want to fight fast, but Baze insists on slow, focused training. Frustrated, she throws her blindfold off the cliff. He agrees to increase the pace but warns her never to complain about the swords again.

At breakfast, Rhordyn unexpectedly joins them at the table. He confronts Orlaith about her grazed leg. She lies, claiming she fell on the stairs, to protect their secret training. Rhordyn confronts Baze about being in her room, who explains about Orlaith’s nightmare.

Trying to ease the tension, Baze asks about Orlaith’s plans. When she mentions her friend Kai, Rhordyn grows cold and challenges her for never having introduced them. When Orlaith tries to leave, Rhordyn commands her to sit with such authority that she obeys.

Rhordyn announces he is hosting a ball and a Conclave for the Masters and Mistresses. He commands Orlaith to attend the ball, saying rumors about her reclusive nature need to be quelled. He threatens that his patience with her fears is wearing thin and alludes to consequences involving her Safety Line. Defeated, she agrees.

Rhordyn informs Orlaith that the tailor Hovard and his assistant Dolcie will fit her for a gown. As she leaves, she takes an apple from Baze’s plate, remarking that Kai likes them. This earns a grunt from Rhordyn.

Orlaith enters the castle kitchen, where Lex, the sous-chef, signals that no strangers are present. Cook greets her warmly. In the cellar, Orlaith retrieves her mousetrap and finds a captured mouse, which she places in a jar. When Cook asks why she requested apple-pastry rolls, a treat Orlaith only wants when feeling blue, Orlaith insists she is fine.

Orlaith enters The Tangle, a network of secret corridors throughout Castle Noir. Inside, she finds a lost girl named Anika shivering on the ground. Anika asks about Orlaith’s raspy voice, which Orlaith explains was caused by an injury when she was little. Anika says she came from the Keep, a forbidden area of the castle.

Orlaith leads Anika back to The Keep’s entrance. Jasken, the massive guard, opens the door. A woman named Vestele harshly pulls Anika inside. When Orlaith tries to follow, Jasken blocks her path, preventing her from seeing inside. Frustrated by being denied entry once again, Orlaith walks away.

Orlaith enters Whispers, a secret passageway she discovered and unlocked 10 years ago. Inside, she is creating a mural by painting individual stones before fitting them into the wall. The passage descends deep into the castle, becoming progressively colder and darker.

Orlaith adds a newly painted stone to the mural depicting a boy surrounded by black blooms, then removes the next unpainted stone. The stone sits at the edge of the illuminated section—the last one she can work on without venturing deeper into darkness.

Deciding to push her boundaries, Orlaith carries a torch and steps into the unlit passage. With each step, the temperature plummets and her flame weakens. After only a short distance, the torch sputters and dies completely, plunging her into absolute darkness. Panicked and feeling watched, she drops the torch, which clatters away as if falling down stairs. She flees back to the light, heart racing, defeated once again by the oppressive darkness that guards the passage’s secrets.

Orlaith descends to Bitten Bay, the black sand cove below the castle, deliberately missing her noon gown fitting. Her friend Kai, a white-haired Ocean Drake with a silver-scaled tail, emerges from the water. He guesses she is avoiding the fitting and teases her about a dress she once made him dispose of.

Orlaith gives Kai a painted rock depicting his treasured home island—a place with crystal spires and a blood-red geyser. She used her own blood to create the red paint. Kai is deeply moved by the gift, calling it the kindest thing anyone has ever done for him. He gives her a rare baby conch shell charm, explaining it is a sea whisperer she can use to summon him. Kai clips it to Orlaith’s necklace beside the black stone she always wears. Noticing her unhealed leg wound from training, Kai licks it. The wound instantly heals, leaving only a faint pink line. He remarks that her blood tastes weird. When Orlaith teases him, Kai grabs her and dunks her into the cold sea.

Soaking wet from the bay, Orlaith runs into Rhordyn in a hallway. He catches her when she stumbles, and the proximity makes her pulse race. Rhordyn blocks Orlaith’s path before a mysterious locked door and confronts her about her healed leg wound. She flippantly mentions Kai’s “multi-talented” tongue.

Rhordyn invites her on his afternoon trip to the village of Barth, tempting her with honey buns, but she refuses. He tells her all he asks is that she live, then escorts her to the gown fitting.

While waiting, Orlaith watches through a gap as Dolcie measures Rhordyn, glimpsing the silver scripture-like tattoos covering his torso. During Orlaith’s fitting, Dolcie creates a revealing neckline despite Orlaith’s request to raise it, claiming she needs to attract suitors. Rhordyn overhears and commands Dolcie to adjust the pattern, threatening to fire her if she resists.

While nervously adjusting the fabric, Dolcie accidentally pricks Orlaith’s breast, drawing blood. Rhordyn orders Hovard and Dolcie from the room. Alone with Orlaith, he approaches and somehow heals the wound without her feeling any contact. He tells her he will not need her blood offering that night, breaking their ritual. As he leaves, he says the gown should be lilac to match her eyes. In defiance, Orlaith asks Hovard for a red, form-fitting, low-backed design.

From her balcony, Orlaith watches Rhordyn begin his evening patrol along her Safety Line, the boundary she refuses to cross. Angered by his breaking their nightly ritual, she decides to watch his patrol up close. She uses The Tangle to reach the forest edge and hides, watching him. At a vine-covered entrance, she thinks she sees him whisper to the flowers before disappearing into the forest. After he leaves, she senses Shay, a wild Irilak shadow creature she befriends.

Recalling Rhordyn’s accusation that she makes no effort to overcome her fears, Orlaith extends her hand across her Safety Line for the first time, holding it there for four seconds before dropping the captured mouse for Shay. The creature eats it and disappears.

Later, Orlaith descends to Puddles, the communal bathing cavern deep beneath the castle. She enters her favorite hot spring, which is pressed against a wall. A crack in the rock connects to another unseen pool, and through it, the water sometimes carries Rhordyn’s scent. She closes her eyes and breathes deeply, savoring the rare moments when the water smells like him.

Kai swims through Dead End, an icy region of the ocean filled with icebergs containing frozen corpses. He communicates with his impatient inner beast, Zykanth, a drako who constantly pushes at Kai’s skin, wanting to be released.

They approach a beautiful island made of crystal spires—the same island Orlaith painted for him. A blood-red geyser flows into the sea, and the crystalline shore glitters in the sunlight. Kai plans to retrieve crystals: one for his treasure trove and another as a thank-you gift for Orlaith. As he nears the beach, extending his hand toward the treasures, a chill runs down his spine. He senses a dangerous, watchful presence. Despite Zykanth’s protests and attempts to force him forward, Kai retreats. He reflects that the waters were once safe and peaceful, but have been taken over by a deadly force.

Orlaith wakes late, suffering from a severe hangover and nausea. To counteract the effects, she takes three Exothryl nodes from her hidden stash—more than ever before. She arrives at the training hall high and cocky, expecting Baze, but finds Rhordyn waiting alone.

Rhordyn reveals that her training was his idea from the beginning. They spar. Orlaith lands a quick first strike, but Rhordyn swiftly disarms and pins her. She knees him in the groin to escape.

Rhordyn demands Orlaith hand over her hidden Exothryl stash, revealing he knows its exact location. Enraged, she attacks ferociously and manages to slice his shirt open. Horrified, she rushes to check for wounds but finds none. He rips off his shirt and attacks with lethal speed, pinning her against a wall.

Baze interrupts to report that the High Mistress has crossed the border. Orlaith declares she quits, but Rhordyn threatens her with daily escorted trips to villages. Defeated, she relents. He states he will return tomorrow night to train her, again refusing her blood offering. When she whispers that she hates him, he turns back with a smile and says she does not “even know the meaning of the word” (113).