In the dark underbelly of Victorian London, young Earl Ciel Phantomhive-known as the Queen's Watchdog-receives a new mission, one that strikes close to home. Ordered to investigate a brutal string of murders and human trafficking within a notorious slum, Ciel and his demon butler, Sebastian Michaelis, must pose as father and son to infiltrate the crime-ridden community. But as they descend deeper into the heart of corruption, memories of Ciel's own harrowing past begin to resurface, blurring the lines between duty and revenge. In a world where darkness feeds on innocence, the Phantomhive name will once again send shivers through the city's most vile denizens. Will Ciel and Sebastian uncover the sinister forces at work, or will this mission reveal more than even they bargained for?