Ki-hyeok, moves to a new place to overcome his broken heart. There are no people like himself and no jobs are even available. One day, he meets Sangwoo in an application, who caught a cold. He fears that Sangwoo will leave him.

Seon-yeong is surprised when Yura, a friend from her hometown, suddenly visits her. Seon-yeong has no choice but to let Yura stay at her place for a few nights since she has no plans. But Yura does not leave, and Seon-yeong gets irritated by her overstays.

Ji-hun often tastes blood because of his unusually sharp canines. He lives with his obsessively caring mother and often thinks of his close friend Ju-seong.

Yu-na, a level-headed and rational insurance claim adjuster, investigates a questionable death by falling with suspicions of suicide. During her investigation, she meets Soon-kyu, the deceased's elusive guardian. As Yu-na probes further, she begins to question whether Soon-kyu is a mentor or a conman, and her carefully guarded inner world starts to shake.