Oz Bezarius (also spelt Vessalius) spends his 15th birthday running away from the maids with his younger sister, Ada and servant, Gilbert. They hide out at Oz's secret spot, where he accidentally falls through the ground leading to a hidden cemetery. There's only one grave there, and a pocket watch is attached to it. As Oz grabs the pocket watch from the tomb, he sees a vision of a homicidal girl before being brought back to reality by Gilbert. While he prepares for his coming of age ceremony, strange figures gather and prepare to carry out their scheme.

Oz manages to shock Raven back to himself, and his gun fires, but at Zwei instead of Oz. Oz follows Raven, who claims that he is no longer the Gilbert Oz once knew, to the place where they found the pocket watch. Oz convinces Gil that he won't let him go even if he's joined the Nightray house (an enemy of Bezarius). Oz goes back for Alice, and on the way to the grave they catch a glimpse of one of Alice's memories, and are drawn into a dream dimension where they are confronted by the Will of the Abyss, who appears in the form of a stuffed rabbit. Gilbert shoots the rabbit and they escape.

The Cheshire Cat is toying with Oz, who responds by making wisecracks. Oz is pulled through the mirror by Jack, and reunited with Gil. Jack asks Oz to help save Alice, who has been trapped inside a memory. Jack sends Oz by himself (upsetting Gil) into the memory of the Tragedy of Sabrie, where he sees a boy which he believes to be Vincent. Bewildered, he chases the boy and follows him to a tower where he finds Alice, dead. Meanwhile, the Cheshire Cat approaches Break within the mirror to finish him off, only to have the tables turned when Break opens his missing eye to unleash his chain, the Mad Hatter.

Oz, Eliot and Leo are trying to get Ada back to the school. Eliot continues to confront Oz about his willingness to sacrifice himself for others, asking him if he'd ever really saved anyone that way. Lotti releases her Chain, Leon, which looks like a large lion with a crown on it's head. When the Baskervilles catch Oz and the others a battle erupts. B. Rabbit appears and so does Jack Vessalius. Then it turns to Lotti's memorie of Jack Vessalius, over 100 years ago.

Oz, Alice, and Gil have been seeking chains for memory fragments for a while now with no success. Ada visits Oz during her holiday break and finds dozens of Pandora guards escorting him; Jack had ordered for Oz's protection when he last appeared (Episode 16). Oscar sees Ada making eyes at Gil and drags him off. Break directs the guards to another task, since he doesn't like being watched. Sharon believes that if the Baskervilles wanted Oz dead, they would have taken care of him already. Gil visits Vincent to ask about Sabrie, but Vincent denies remembering anything. Independent of Gil, Oz and Alice also try to see Vincent but are immediately turned away by Echo. Vincent tells Echo that no one needs to know what happened. To find more clues, Oz and co. visit the mansion where his coming of age ceremony was interrupted. He reenacts the ceremony in the hopes of discovering something. Trump cards appear and attack Alice, who defeats them. The city of Reveille is on fire.