At work, she's a renowned assassin. At home, she's a single mom to a teenage daughter. Killing? That's easy. It's parenting that's the hard part.

A new virus (a.k.a “fantomal virus”) is transmitted to a small rural village. Dasol, a three-month nurse working in the village hospital, is being workplace bullying (a.k.a “burned”). In the meantime, Dasol begins to educate a new nurse Eunbi earlier than expected due to the poor ward situation.

Suffering from the loss of their eldest son, Yeon-jung's family starts to fall apart when they lie to each other about their personal motives in life. After betrayal and disappointments are exposed, they rediscover their love for one another while trying to fulfill a promise they made to their deceased son.

Ban Dong-uk, a university student struggling with chronic insomnia and lingering anxiety, discovers that the only time he can sleep peacefully is when he is near Lee Do-hyeon, the confident captain of the school’s basketball team. The two share a complicated history from their high school days, when misunderstandings and unspoken feelings drove them apart. Reuniting on campus forces them to confront that past while navigating the pressures of college life and athletics. As Dong-uk grows increasingly dependent on Do-hyeon’s calming presence, their renewed closeness gradually reveals the affection they once buried. What begins as an unusual need for comfort slowly turns into a deeper emotional bond, pushing both young men to face their vulnerabilities and reconsider what their relationship truly means.