Kim Moo-Young wakes up to find he has become a zombie with no memories of his past. Witnessing the death of a Detective, he has assumed his identity to try discover the mysteries of his past. Meanwhile, Kong Sun-Ji works as investigative journalist who quits whilst investigating the 'Santa Killer' case. By chance the two are brought together and various circumstances lead to Sun-Ji working at Moo-Young's detective agency as an intern.

• Choi Jin-hyuk
• Park Ju-hyun
• Hwang Bo-ra
• Kwon Hwa-woon
• Ahn Se-ha
• Tae Hang-ho
• Lee Jung-ok
• Bae Yoo-ram