The following morning, Cleopatra waits in the dining chamber for her siblings. Theos enters alone, visibly shocked by her presence, and accuses her of serving Apep, the god of chaos. She challenges the accusation and invokes Isis as her patron deity. When pressed, Theos admits his true grievance: She has always treated him as a child and excluded him from decisions. Arsinoe arrives and quickly reads the situation, giving herself away, but not directly acknowledging her role in the conspiracy. The youngest Ptolemy brother enters, oblivious to the tension.

Caesar arrives deliberately late—a tactic to unsettle his audience and make them more agreeable. He proposes a toast to the queen’s health. Theos complies, but Arsinoe refuses and demands to know Pothinus’s whereabouts. Caesar reports the regent fled before he could be apprehended. Arsinoe correctly deduces the alliance between Cleopatra and Caesar, then challenges Theos’s loyalty. She accuses Cleopatra of lacking genuine divine favor and illegally removing the regent. Cleopatra warns that such words constitute treason, and a Roman guard draws his weapon. Arsinoe storms out. Theos excuses himself to swim, but Cleopatra instructs him to attend court that afternoon as her co-ruler.

Alone with Caesar, Cleopatra learns that Pothinus’s quarters were found abandoned. Caesar advises that she must manage the nobility to maintain power, but she counters with ambitious reform plans. They spend the morning in intellectual conversation until a soldier brings urgent news: Arsinoe and Theos have fled the palace on a royal barge with armed supporters, killing loyal guards in their escape.

Cleopatra races to the harbor, where she finds the bodies of her slain guards. From the departing vessel, Arsinoe shouts a devastating revelation: She was the true mastermind behind the rebellion. The betrayal causes Cleopatra to collapse in shock. Nearby, she discovers Ahmose, a guard who has served her for years, mortally wounded. Charmion arrives with medical supplies, but Cleopatra realizes the abdominal injury is beyond her skill and she possesses no divine healing power to save him. Finding opium in her bag, she tells the distraught Charmion—who clearly loves Ahmose—that she can only ease his death. She administers the drug, and he dies peacefully.

After arranging for Ahmose’s honorable burial and care for his parents, Cleopatra turns to Caesar and confirms what both now understand: War is inevitable.

Over two months, war engulfs Alexandria. Both sides construct defensive fortifications, and the siege gradually affects even the island of Antirhodos. Food supplies dwindle critically. In the royal menagerie, Cleopatra shows Caesar her starving lions; most other animals have already been released to save the cost of their care, but the lions are too dangerous to free. She mentions having raised one lioness from a wounded cub, and says she will never cage birds—it reminds her painfully of Arsinoe.

Caesar offers to kill the lions himself, but she insists the task is hers. He reports that the enemy fleet, though damaged by earlier Roman raids, is being repaired by skilled fishermen. It is time, he argues, to launch an offensive strike. Confronted by the lions’ suffering and the war’s brutal reality, Cleopatra gives the order to send men to burn her siblings’ ships. She recognizes this moment as the beginning of her emotional hardening. That afternoon, she takes her bow and kills the captive lions herself without shedding tears.

That evening, she and Caesar dine together while the operation unfolds. She feels guilty enjoying the respite while her people die and observes that, regardless of who wins, Egypt loses. When she mentions needing additional grain, Caesar reveals he has already ordered a supply convoy without consulting her. Angered, she insists they are equal partners and that he must keep her informed of all decisions.

During their argument, Cleopatra notices a distant glow. Caesar assumes their operation has succeeded, but she identifies the fire’s location: It originates from the east. She is horrified to realize what is burning—the Library of Alexandria. She immediately declares she must go to the mainland to assess the damage. Caesar protests that the city is a war zone, but she refuses his offer to accompany her, pointing out that he is too recognizable. He pleads for her safe return, hinting at deeper feelings. She promises she will come back to him.

Before dawn, Cleopatra and Charmion row to the mainland through thick smoke, passing the smoldering ruins of the enemy fleet. The city shows extensive destruction from both the siege and earlier sabotage.

Reaching the Library of Alexandria, Cleopatra finds it engulfed in flames. She attempts to enter, but Charmion physically restrains her. From the entrance, she glimpses the sacred tree of knowledge inside, its final flower-scroll unfurling as it burns. She whispers a prayer to Seshat, goddess of knowledge, as Charmion pulls her to safety. Walking back toward their boat, grieving for Ahmose and the war’s toll, they hear a voice and follow it.

They find Pothinus addressing fishermen from atop ruined buildings. He accuses Cleopatra of conspiring to make Egypt a Roman province, declaring that she “only fights for the man in her bed. She is a whore” (145). The slur wounds her deeply—it is the first time she has been called this word publicly, though she cannot deny her feelings for Caesar. A cloaked figure suddenly tackles Pothinus, killing him with a sword. As chaos erupts, Charmion drags Cleopatra away. Cleopatra recognizes the weapon and the hand that wields it: Caesar has followed her despite her instructions.

Cleopatra storms into Caesar’s chambers and confronts him with his bloodied sword. He admits he could not allow her to walk into danger alone. Their argument builds in intensity until he asks for a kiss. They embrace passionately, but Pothinus’s insult echoes in her mind, and she breaks away. Caesar kneels and offers her his sword to punish him as she chooses. Cleopatra reflects that she has already been branded a whore and the word cannot be unspoken. She drops the weapon, kneels to meet him as an equal, and declares that he is what she desires. They kiss again, fully committing to their relationship.

Three months later, Cleopatra is pregnant. In the unfinished Temple of Isis, she experiences dizziness and weakness. Charmion, who has been tracking her symptoms and missed cycles, deduces the truth. The realization overwhelms Cleopatra. When Caesar returns from battle that day, she nervously tells him. His reaction is immediate joy. He kisses her stomach, and they celebrate together.

Months later, when Cleopatra is heavily pregnant, her administrator, Faunus, reports that Caesar is missing and presumed dead after his ship was ambushed and sunk. She refuses to believe it without seeing a body and orders search parties deployed. She goes to the shoreline and waits through the day and into the night, refusing food. Charmion has servants bring Cleopatra’s throne to the beach. After the final search boat returns empty, shouting from the shore draws her attention. She runs to find a figure swimming toward land—Caesar crawls out exhausted, clutching a sodden scroll of convoy details he has saved for her.

Cleopatra forces him to rest for three days, and they discuss Egypt’s future. Caesar suggests she co-rule with her youngest brother, Ptolemy, to repair her damaged reputation among nobility who doubt her divine blessing and ability to rule. Their conversation turns personal; he promises to remain until their child is born, then send for her to join him in Rome. He envisions their son running through Roman vineyards, nicknaming him Caesarion—“Little Caesar.”

Caesar arranges a parley with Arsinoe and Theos. Despite his concerns, Cleopatra insists on attending. On a boat at sea, Cleopatra, Caesar, and young Ptolemy meet the rebel siblings. Before the encounter, she asks Ptolemy to use his prophetic gift—foretelling death. He reports that no one on the enemy vessel will die that day. When the boats draw near, Arsinoe notices Caesar’s protective hand on Cleopatra’s pregnant belly.

Caesar demands their surrender. Arsinoe flatly refuses. Cleopatra appeals directly to Theos, offering him a peaceful return home. He wavers, but Arsinoe challenges his pride, warning him that he will never be allowed to make his own decisions. After a brief exchange between the siblings, an enraged Arsinoe shoves Theos off the boat into the sea. Weighed down by his heavy gold armor, he begins to sink despite his ability to breathe underwater. Caesar notes it is too late for rescue unless Theos can remove the armor himself. Cleopatra realizes he cannot—the suit’s complex hinges require multiple people to unfasten.

They comprehend the horror: Theos is not dead, as Ptolemy predicted, but trapped on the ocean floor, unable to escape. Grief and shame overwhelm Cleopatra as Caesar holds her. As Arsinoe’s vessel flees, Caesar prepares to order pursuit, but Cleopatra stops him. She says they will end the war the following day, allowing Arsinoe to escape for now. She whispers a farewell to Theos, hoping he finds solace in his underwater prison, though she knows dehydration or old age will eventually claim him.