One day, an unknown existence appears and announces that everyone will die. To survive judgment day, those who have witnessed the death of their immediate family members must share their lives with those around them.

Cheol-gyu, who is living a successful life, is visited by his old hometown friend, Young-hun. Young-hoon, who is about to get married, asks Cheol-gyu to be HamJinabi. Cheol-gyu hesitates at the request of a friend who has not contacted lately. But… The marriage partner was Soon-i .Hearing the name 'Soon-i', Cheol-gyu feels that he cannot refuse the request. He goes to the bride's house to be a hamjinabi with his friend 'Nak-gyun'.

After being laid off, Ji-won, an outsourced sanitation worker in a provincial town, seeks reinstatement but is met with indifference. When he uncovers a secret about his coworker Jun-seo, he confronts the supervisor who pushed him out, demanding an apology. That night, an accident forces him to choose between truth and survival.

In a world where, due to a national economic crisis, the government provides euthanasia pills to individuals past a certain age, government officials visit Jiman's house.