Führer Bradley arrives home to give his son Selim a birthday present for his tenth birthday, which is a train. Elsewhere, Envy reveals to Al that they are with his master, and unlike his fellow homunculi, Envy doesn’t care about becoming human, so he isn’t fooled by her false promise. Envy leaves the room and states that the 7,000 soldiers killed in Reola and the Ishvalans killed in Ishval are in the Philosopher’s Stone, causing Al to wish he had died when he had the chance to do so several times before. Meanwhile, Ed meets the Tringham brothers Russell and Fletcher at an abandoned church that has a secret entrance that was noted in their father’s journal. Russell explains the story that when their father came to Central City years ago to learn how to refine red water, he ended up working in Laboratory 5 until one day an alchemist showed Nash the real secret lab to teach him how to perfectly refine red water to philosopher’s Stone. Getting to know this lab. 5 was the queue, Ed transmutes and then goes through the secret entrance himself, promising Russel not to create the stone. Along the way, Ed discovers an ancient city hidden beneath Central, and Ed remembers what Russell told him from the diary, realizing that when someone created the Philosopher’s Stone 400 years ago, the city was hidden underground to hide the knowledge of human sacrifice. Ed realizes that his father was probably involved.
At their hideout, Dante makes it clear that Rosé will be her next host. However, the problems they have include Gluttony feeling lonely without Lust and Wrath desperate to use the stone to revive sloth, prompting Envy to beat the other up. Back at Central Command, Izumi is having trouble fighting Archer as his automail armor is too strong for her transmutations when his backup arrives. Izumi says that she hates the military because of Archer, calling him a power-hungry blood-sucking filth. Archer offers her to join him and his men, claiming that the army will eventually take over the country, which Izumi flatly refuses. Izumi can barely make another shield before her condition affects her. As Archer is ready to finish her off, 2nd Lt. Ross and Sargent Brosh with their own support to support Izumi. Ed arrives at Dante’s mansion and notices Rosé dancing. In Resembool, Sheska realizes and mentions to Winry that the homunculi’s actions were actually intended to prevent reckless humans from dangerously creating the Philosopher’s Stone and using it for themselves, the origin of the rumor of how the stone was too dangerous. complete. After dancing with Rosé, Ed discovers that Lyra brought her there when she shows up with Rosé’s baby.
Dante again pretends to be Lyra and tries to cover up the details of how she knew about the place. However, Ed now realizes that he is actually Dante and explains the mistakes she made in her faked death: the transmutation ring that seals the homunculus was found in her house along with the bones of the human that Greed was modeled after, so he couldn’t do nothing. Additionally, Ed now realizes that the Philosopher’s Stone can be used to transfer souls between bodies, allowing them to live for centuries, and is the main reason why Dante killed the real Lyra, whose soul was inside her old body. To prove his point, Ed summons a transmuted spear, which Dante quickly destroys, verifying that she has seen a Gate that allows her to transmute without the ring, something the real Lyra is unable to do. She confirms that the inhabitants of the ancient city were killed to create the stone, although Hohenheim was the one who made the stone for her. She then reveals that her mission is to protect humanity from the foolish use of the stone, which is why she spreads rumors about the stone, as well as stealing it should anyone complete it. Dante also reveals that he will make love to Ed once he takes over Rosé’s body. Gluttony then comes looking for Lust. After Ed convinces him that Wrath killed Lust, Gluttony leaves, depressed, and Ed continues to attack Dante. He dodges her attack and cuts part of her dress with his autosword, confirming that the mutilated skin on Lyra’s body is a sign that Dante cannot transfer her soul between bodies forever.
Dante reveals that Equivalent Exchange is a lie when he claims that not everyone gets the same from what was lost, and mentions that although many people apply for the state alchemy exams, few succeed. Dante uses his transformed stone snake to grab Rosé’s baby and states that not all are created equal, Dante continues to lecture Ed and he ignores her and saves the baby. However, the transmutation ring on the baby sends him to the other side of the gate in a parallel world. Ed wakes up to find himself in another body and discovers his father. Once he confirms that it’s Ed from his world, Hohenheim tells him to run because it’s the day Zeppelins drop bombs on London during World War I.