Reincarnated as a minor character in a novel, Cha Seon-taek unexpectedly spends a night with Prince Kyungsung, sparking an intense and unexpected romance.

Tin, a jaded doctor, gets trapped in a time loop after a tragic ER case, forcing him to relivethe same night until he finds a way to save a life.

Je is a girl who has luck all the time, while Not has bad luck. One night these two, came across each other and their luck reversed. Je was unhappy about this settlement, so she's planning to get her luck back.