An upper-class widow in Joseon keeps her double life as a masked vigilante under wraps — until a government official learns of her nightly escapades.

The story of patients and the caregivers of a hospice department. It is the story of people who dream of 'well-dying'.

After barely surviving a violent attack by an elusive serial killer, crime boss Jang Dong-su finds himself forming an unlikely partnership with local detective Jung Tae-seok to catch the sadistic killer simply known as "K".