Ciel Phantomhive is awakened by his butler, Sebastian Michaelis, who informs Ciel that Damian, the head of one of his factories, is coming for a visit. Sebastian orders the household staff, Bard, the cook, Finian, the gardener, and Meirin, the maid, to prepare for Damian's arrival. However, their attempts result in disaster, as Bard overcooks the food, Finian kills the garden by spraying herbicides on it, and Meirin breaks all of the silverware. To resolve the situation, Sebastian orders them to rearrange the yard into a stone Japanese garden and has Bard make beef tataki. Damian, impressed with the staff's preparations, plays a board game with Ciel in which his character loses his legs and is ultimately incinerated. Following the dinner, Damian calls his associate, commenting that the factory he owns has been sold and he is attempting to fraudulently acquire more money from Ciel. When Damian attempts to return to the lounge, the scenario in the game occurs in real life, as he breaks one of his legs, and Sebastian locks him in the oven, to be cooked alive with the dessert.

Ciel is kidnapped for ransom, but Sebastian easily defeats a mob of underlings and retrieves his master.

Elizabeth, Ciel's fiancee, arrives at the Phantomhive Estate for a visit and Ciel learns to dance with her.

The news of Jack the Ripper terrorizes the city of London and Sebastian and Ciel attend a ball in disguise in order to stop the culprit.

Ciel and Sebastian continue to pursue Jack the Ripper and come to a confrontation at the house of the latest victim.

Sebastian ends Jack the Ripper's reign of terror. Later, Ciel and Sebastian attend Madam Red's funeral and visit the grave of Jack the Ripper's last victim.

Ciel and all of his servants visit a village haunted by a demon dog to get rid of that dog.

Ciel and his servants confront the real demon dog of the village of Houndsworth and end up taking it home.

Ciel assigns his servants to take a photo of Sebastian with a special camera, but their efforts fail over and over again.

Ciel and Sebastian visit a festival held on the frozen Thames River and enter an ice-sculpting contest for the prize.

Elizabeth becomes distraught and goes missing and Ciel and Sebastian head into the heart of London to search for her.

Ciel finds Elizabeth in a tower and rescues her after a brief battle against Drocell. Sebastian does not pursue a strange puppet that seems to have controlled Drocell as its master is faraway. Later, Elizabeth celebrates Ciel's 13th birthday with a party at the Phantomhive Estate.

Ciel begrudgingly lets Prince Soma and his butler, Agni, who arrived from India in search of someone, take up temporary residence at the Phantomhive Estate.

Agni is revealed to be working for someone and Prince Soma plans to find out why. Along the way, A new goal is set to compete in the Curry Festival. At the end, Queen Victoria appears.

Queen Victoria attends the Curry Festival competition. Sebastian creates his curry with chocolate, Agni uses blue lobster, and another chef uses a mysterious spice that was given to him by Angela. Sebastian ends up winning with his curry bread, but the people who ate curry, with mysterious spice become possessed and start attacking others. Sebastian and Agni fight them off and they are cured after a taste of Sebastian's curry. With the competition over, Prince Soma and Agni bid farewell to Ciel and Sebastian and return to their homeland.

Ciel is informed that the abandoned Ludlow Castle that his estate owns is haunted by ghosts and the workers are too spooked to continue remodeling it into a hotel, so he and Sebastian head to the castle to investigate. There they encounter the ghosts of two princes who were assassinated four centuries ago, Edward V and his brother Richard. Ciel plays a game of chess against Edward V to pass the night, but he loses and Sebastian is taken away from him. Alone, Ciel solves the mystery behind the princes. The ghosts of Edward V and Richard thank Ciel and Sebastian before departing for afterlife, and the remodeling of Ludlow Castle resumes.

Queen Victoria's butler informs Ciel that an abandoned monastery in rural Preston has been taken over by a cult and possibly planning to overthrow the government, so Ciel and Sebastian head there to investigate with the Undertaker and Grell. They find that the cult uses a strange book known as Doomsday Book to recruit new members and expose their pasts. Ciel is summoned one night and gets taken away by Angela, who reveals herself to be an angel.

Angela uses Cinematic Record to force Ciel recall his painful past, including the events surrounding his parents' murder, but Ciel eventually rejects her attempt to rewrite his past. She then attempts to purify the members of the cult, but Sebastian, Grell, and William incapacitates her. Angela destroys the monastery and escapes.

The body of John Stanley, a man who worked under the Queen, is found murdered in the River Thames. The Queen orders Ciel to retrieve an item from Stanley's body. Ciel goes to Lau, who controls the area where Stanley's body was discovered, for information. Lau does not recognize the name, but mentions a new drug, Lady Blanc, the name of which reminds Ciel of Angela. A large amount of the illicit drug is later found in one of Ciel's warehouses. Lau and Ciel are charged with drug trafficking, but Lau escapes. Ciel is separated from Sebastian, who is taken to the Tower. It is revealed that orders for the arrest where given by the Queen through her butler, Ash, with the drugs planted as a pretext.

Sebastian is tortured in Tower of London by guardsmen and Angela. Ciel continues to pursue Stanley's case on his own, though Abberline declares his allegiance with Ciel. Ciel frees Sebastian by summoning him through their contract, and together they manage to get onto Lau's junk. Sebastian duels against Ranmao as Ciel confronts Lau, who turns his dao on Ciel. Abberline intercepts in time to take a fatal blow for Ciel and his subsequently dies from the wound under Ciel's eyes. Sebastian strikes a blow on Lau to prevent him from continuing to fight, and escapes from the sinking junk with his master.

Ciel's servants show off their hidden talents in an effort to cheer up their master.

Ciel and Sebastian head off to the Exposition Universelle in Paris to meet Queen Victoria and become wrapped up in the festivities of the Expo.

The Phantomhive mansion is burnt to the ground and Tanaka is seen writing in his diary alone in the debris. Ciel stows away in the cargo hold of a London-bound steamship, where he meets the Undertaker, who informs Ciel that he is about to die.

Ciel heads to the Tower Bridge that is still in mid-construction with Sebastian, where he finds the angel Ash.