Three terminally ill patients befriend each other in a hospital and plot to destroy an evil person. However, their life changes when they meet a detective.

In-sook, Se-yeon and Mi-do's alibi leads to a revenge battle at a party. Shi-young finds something suspicious at the murder scene, and Woo-cheon comes up with something at In-sook's house.

In-sook, Mi-do and Se-yeon attempt to hide the evidence of the murder. In-sook misunderstands Woo-cheon, who tries to save her from the fire in the hospice.

Woo-cheon stops In-sook from accidentally confessing to Shi-young. Seung-soon catches Woo-cheon and pressures him to surrender as the investigation escalates.

In-suk discovers Woo-cheon's true nature and ends up getting disappointed in him. Meanwhile, Ji-soo decides to support Mido's hospice.

Woo-cheon decides to turn himself in to protect In-sook. She recalls childhood memories she shared with him.