Ari approaches Sam on the moonlit beach, noting that she already has a gun drawn. Sam identifies herself as “Mozart,” named for the composer’s talented-but-forgotten sister, while Ari is “Shakespeare.” They accuse each other of being pawns for their respective syndicates.

Sam asks why he wanted her to come, and Ari admits he does not know. She mentions that Will would be pleased if she killed Ari,. He transmutes a knife from stone and approaches until they stand a foot apart, both armed. Sam confirms that Will does not know she is there. Ari correctly intuits that Sam was involved in killing the Lumines crewmen and observes that something haunts her.

Sam asks why he stopped responding to her messages after high school. Ari explains that he was trying to protect her, believing she was going on to college and was too good for the alchemy world. Sam reveals that she joined Grand Central because she and her mother needed money. They realize they would have lost each other regardless.

When Sam asks what the point of their meeting is, Ari confesses that he missed her. As a gesture of peace, he transmutes his knife to saltwater; she transmutes her gun to sand. He tells her he will try to come at every full moon. After she leaves, Ari calls Isla, who informs him that Reed wants him at the Oxford conference to negotiate with other syndicates. She also reveals that Lumines has just captured Hanover, Diamond’s assistant. Ari wonders whether the timing was deliberate.

Three days after his capture by Lumines, Hanover’s tortured body is returned to the Red City gates. Sam cannot separate his capture from her meeting with Ari but doubts Ari set it up. At the estate, Diamond, Will, and Sam discuss retaliation. Diamond proposes breaking the unspoken rule by targeting a Lumines philosopher: Dominique St. Clair, who will attend the Oxford conference. Diamond assigns the assassination to Sam, who will accompany Will but work alone. When Will objects that Sam is too new, Diamond insists no one will notice her. Eager to prove herself, Sam agrees.

Sam lies to her mother, saying she is traveling to Berlin for a business conference, and provides false travel details. In Londinium, the day before the conference, Will takes Sam shopping on Bond Street. They visit luxury retailers Louis Vuitton, Hermès, and Dior, where they receive exclusive service with no prices mentioned. Sam feels unmoored by this unfamiliar culture of extreme wealth.

At Harry Winston, Sam is drawn to a platinum and sapphire bracelet shaped like Peter Rabbit, which reminds her of her childhood toy, Rabbit. Will buys it for her without asking the price. Holding her wrist, he tells her that if it is the nicest thing she has ever owned, then it costs more than anything in the world.

Sam and Will arrive at the syndicate gala at Magdalen College, Oxford. Sam wears her new designer gown and has taken sand to calm her nerves and enhance her appearance. Though she looks stunning, the drug makes her less noticeable to others, reinforcing her invisibility. Will, however, sees her.

They circulate through the crowd, observing various syndicate crests. While Will speaks with Eleanor Mien and her wife Hanya, leaders of the Belle Epoque syndicate, Sam spots Ari across the courtyard talking with a woman in a yellow dress—both wearing Lumines fox pins. Will returns and asks Sam to dance, his hand on her bare back. During their charged exchange, he reminds her of her assignment and identifies her target: The woman in the yellow dress is Dominique St. Clair. The glamour of the evening dissolves into dread. Will instructs Sam to kill Dominique quietly, then leave immediately and meet him in Londinium the next day.

Dominique leaves the party, and Sam follows her to a quiet pathway. Sam’s steps are so silent that Dominique does not hear her approach. Sam transmutes a knife from the stone wall and attacks. Dominique, a trained alchemist, defends herself by transmuting a shield, but Sam shatters it into glass. As Dominique recovers, Sam transmutes a second knife and stabs her in the chest, muffling her gasp. Sam notes that the second killing is easier than the first, as Sebastian said it would be. After Dominique dies, Sam alchemically closes the wound and transmutes blood on the clothing into water, removing all evidence. She leaves the body to be found as a message from Diamond to Lumines, then walks away having left no physical trace.

Ari returns to the party but cannot find Dominique. He sees Will and Sam dancing together and feels jealous. As the evening progresses and Dominique remains missing, an ominous feeling grows. Severe anxiety overwhelms him, and he leaves the party.

Back at his hotel suite, Ari finds Rudra, drunk and hostile, waiting for him. Rudra confronts Ari about Reed giving him assignments, accusing Reed of turning them against each other. He attacks Ari, throwing hot tea at him, which Ari transmutes to ice. Rudra slams him against the fridge and transmutes metal thorns around his neck, drawing blood.

As Ari suffers a full panic attack, Rudra reveals that Dominique is dead. Ari is devastated by the news of his friend’s murder and intuits that Sam killed her. His panic peaks, and he begs Rudra for help. Rudra mocks him, then warns that no one is safe and they are all pawns. Reminded of Zan, whom Rudra once dragged into a laboratory before he disappeared, Ari understands the threat. Rudra retracts the thorns, tells Ari to remember his place or be killed, and leaves him collapsed on the floor, fighting his panic alone.

Sam’s driver takes her from Oxford to Londinium. The sand in her system makes the memory of the killing vivid and inescapable. At the hotel, staff do not seem to see or acknowledge her. Terrified of being alone with her thoughts, she stops at Will’s door. She thinks of Ari and feels an overwhelming urge to cry. She takes another dose of sand and knocks.

Will opens the door and can tell from her expression that her mission succeeded. She enters and tells him she wants to forget. He kisses her, and she responds passionately. As he drops his wine glass, pulling her against him, Sam surrenders to physical sensation, desperate to replace the memory of murder.

Will blindfolds her with his necktie. The second dose of sand heightens her senses. Their sexual encounter becomes a violent struggle for power they both seem to want. As he climaxes, rasping her name, she feels completely seen by him for that moment. She is unsure whether she loves him, is starved for affection, or is only escaping grief. Looking out at the city lights, she feels a sense of infinite possibility.

The next day, Ari, Reed, Rudra, and Isla meet to discuss their response to Dominique’s murder. Ari shows visible wounds and exhaustion from Rudra’s attack. When Rudra suggests pressuring Grand Central into negotiations, Reed dismisses the idea with contempt, declaring that they will annihilate Grand Central instead.

Isla suggests targeting Mozart, the source of Diamond’s recent attacks, and nominates Ari for the task. Reed agrees but clarifies he does not want Ari to kill Sam—rather, to hurt her by targeting the person she cares about most. Ari thinks of Sam’s mother but feigns uncertainty. Reed dismisses Rudra and Isla, dispatching them to other tasks, then confronts Ari alone about not being fully honest regarding his relationship with Sam.

To force Ari’s cooperation, Reed gives him a folder containing recent photographs of his family in India: his sister with her child, his father, mother, and uncle. Ari is overcome with grief for the life he has missed. He understands that the photos are a threat.

Under duress, Ari reveals that Sam’s mother’s name is Connie Sun and that Sam joined Grand Central to protect her. Reed outlines his plan: Lumines will kidnap Connie. Ari will contact Sam and arrange a meeting to return her mother. The meeting will be an ambush to kill Sam. Reed promises that if Ari succeeds, his family will be safe, and he will eventually inherit Lumines; if he fails, Lumines will cut their losses—a subtle threat that Ari and his family will be killed. Defeated, Ari agrees.

Back in Angel City, no evidence connects Sam to Dominique’s death. She feels numb and continues her relationship with Will to distract herself. Another $1 million bonus appears in her account. Tormented by the money, Sam decides to do something good with it and buys her mother a multimillion-dollar house in cash.

She visits her mother, who is preparing dinner and eyeing Sam’s expensive new clothes with suspicion. Sam gives her the title to the house. Her mother’s reaction is hollow and unreadable, disappointing Sam. Her mother confronts her, revealing she checked flight records and knows Sam lied about going to Berlin—she actually flew to Londinium. The conversation escalates into a major argument.

Her mother says there is a weight on Sam and demands to know what she is really doing to make so much money. She calls Sam a “stupid girl,” triggering childhood trauma. Sam accuses her mother of never being emotionally present. In anger, her mother retorts that Sam is lucky she kept her. Deeply wounded, Sam unconsciously turns the table wood to ash under her fingers before quickly reversing it. She realizes her mother does not suspect she is an alchemist, highlighting the vast emotional gulf between them. Sam leaves while her mother continues eating in silence.

That night, Sam dreams of her mother tying her hair when she was a child. In the dream, they share a moment of profound grief and emotional openness that has never happened in real life. They look at each other, hearts breaking, without knowing why.