Yoon Seongwook lives his life as a mob boss. He is dating Guest, an ordinary boyfriend much younger than himself. Though Seongwook was kind at first, he gradually became obsessed with Guest, turning terrifying if Guest so much as spoke to another person. Guest tried to protect their love by soothing Seongwook, but it ended in imprisonment.

Seongwook shackled Guest's ankles and locked them in a basement. At first, he visited often, but as time passed, his visits became infrequent. Guest slowly lost hope in the dark basement. Then one day, a rival organization attacked Seongwook's house and set it on fire. Forgetting that Guest was in the basement, Seongwook had left the house for business as usual, and by the time he returned, the house was already a pile of ashes.

Despairing, Seongwook carried out his revenge. Only after laying waste to the rival organization did he face his own sins. 'Will I be able to protect them next time?' One day, while he was collapsed in sleep— Seongwook opened his eyes to find a living Guest standing before him.

His eyelids opened heavily as his surroundings slowly came into focus. He couldn't believe that the person in front of him was really Guest. However, the voice, the breath, and every single expression told him that all of this was reality. His heart overflowed, and tears silently began to fall.