Hong Yun has always lived an unlucky life, plagued by evil spirits. And just as he's about to finally break free, he gets into a car accident. As he's slowly dying, Tae-shin, an emissary of the underworld, appears before him. Tae-shin tells him he needs Hong Yun’s life force to complete his mission and offers him a life-or-death contract. In order to survive, Hong Yun has no choice but to accept—however, there is a catch: the only way to transfer the energy is through physical intimacy. Despite his reluctance, Hong Yun agrees to the contract... But can he really escape his fate? "I’ll collect twenty-three years' worth of favors from your body. Given the situation, wouldn’t it be better if you just enjoyed it?”