Kim Jaeho wakes up in a dirty alley, remembering only his name and some faint fruity scent. Then he realizes he has become a ghost, but his body is gone—and the only one who can see him is the pragmatic police officer Pak Yundjun, who doesn’t believe in ghosts. Together, they must unravel the tangled mystery of a strange crime, and to get his life back, Jaeho must first remember how he lost it.