PandoraHearts

While exploring a mansion Oz Vessalius, heir to the prestigious Vessalius family, hears the sound of a music box. Drawn to the melody, he discovers a grave. When Oz touches the pocket watch on that grave, his mind gets sent to another world.

Before Oz’s coming-of-age ceremony, he isr introduced to Duchess Rainsworth's granddaughter. Oz instantly falls in love. As he recites his oath, the Silent Clock moves for the first time in 100 years. The bell rings as intruders interrupt the ceremony.

Oz is dropped into the Abyss by a mysterious band of intruders during his coming-of-age ceremony. Still confused about what happened, bizarre-looking dolls begin to attack him.

After returning from the Abyss, Oz finds himself at one of the Rainsworth family's mansions. He is welcomed by Sharon, Break, and Raven, who inform him that Pandora, an organization formed by the Four Great Dukes, are after him.

Oz and Alice are practically forced to cooperate with Break. A string of murders by a Chain occurred in a town called Northumbria and they are the ones being sent to investigate it with Raven.

Oz returns to the mansion where his coming-of-age ceremony was held in an effort to find clues regarding Alice’s memories. This mansion had remained under Pandora's jurisdiction ever since Oz had been sent to the Abyss.

A stuffed rabbit appears before Alice while she was feeling lonely at the mansion. The rabbit mocks her and disappears before is reveals what it is. Alice realizes that a piece of her memory is locked away somewhere inside the mansion.

Oz wakes up inside Gilbert’s home in the capital of Reveille. While there, he has many of his doubts quelled by Break, but some questions still remain unanswered about the Abyss.

Gilbert tells Alice about Oz’s father and painful past. On the other hand, Oz has made friends with a young boy named Philip, only to have a girl called Echo come for his life.

Philip’s father is an Illegal Contractor. B-Rabbit's attacks hurt the Chain and the Illegal Contractor equally, causing Oz to stop Alice by force. Oz sees himself in Philip and tries to convince Philip’s father to mend his ways.

Gilbert tells Oz and Alice about how he had come to be adopted by the Nightray family. After Oz was dropped into the Abyss, Vincent Nightray requests that his family take Gilbert in.

While Oz is out looking for Gilbert’s lost hat, he ends up in an arm wrestling match with some drunkards from a tavern. Oscar appears, causing Gilbert to go into a panic.

Break and Alice are missing. Oz asks Sharon to help find them. Using Sharon’s Chain, they make their way into the dwelling of Cheshire Cat. They manage to escape at the last minute, but Oz and Gilbert get separated in the process.

After getting separated from Gilbert, Oz is still being pursued by Cheshire Cat. A mysterious man from Alice’s memories appears and pulls Oz inside a mirror. After reuniting Oz and Gilbert, this man requests that they go and help Alice.

Oz gets transported to a dimension created from Alice’s memories. There, he witnesses a shocking scene from a certain event from the past. As if resonating with his subconscious, B-Rabbit’s powers begin to go out of control.

Oz and Alice narrowly escape Cheshire Cat’s dwelling before it implodes on itself. They find themselves in the meeting room where the Four Great Dukes have gathered. Break also returns to the real world, but is informed that Sharon has gone missing.

With Sharon missing, Break hurries to her rescue. Though he makes an irreplaceable sacrifice, Break manages to save her. Afterward, a single letter finds its way into Oscar’s hands that would soon cause a great commotion.

Oz and his group manage to sneak inside Lutwidge Academy. After overhearing a piano playing the same tune as the music box in his pocket watch, Oz makes his way to the school library, where he meets Elliot and Reo.

Oz and Elliot try to flee from the Citizens of Baskerville through the academy's underground passageways. They try to fight back to protect Ada, but are easily knocked away by a Citizen of Baskerville's Chain.

Everyone returns to the Rainsworth manor after their scuffle with the Citizens of Baskerville. However, Oz, Gilbert, and Alice are still depressed over what happened at the Lutwidge Academy.

The Tragedy of Sablier is the key to discovering the truth. Oz and his group decide to pay a visit to Rufus Barma, the longest-living man among the Four Great Dukes. The duke they seek happens to be a bizarre round creature in a suit.

More of the truth is revealed through Break and Barma. Break’s past, the connection between Alice and the Abyss, and Vincent as well. Everything has something to do with Oz, Alice, and Gilbert.

Oz continues to search for pieces of Alice’s memories, but is unsuccessful. Gilbert continues to seek the truth about what occurred 100 years ago, but that attempt seems futile.

A massive number of Chains suddenly appear in Reveille. According to Alice, a change in the Will of the Abyss is the cause. Members of Pandora are dispatched to stop the invasion, but their effectiveness is limited.