The Grim Reaper appears as the person you love the most before you die. In front of 24-year-old Hee-wan who had no will to carry on and lived as a social outcast, her childhood friend as well as her first love Ram-woo appears as a Grim Reaper and tells her she will die in a week. Hee-wan and Ram-woo are forced to spend a week together. Throughout their time together, they rediscover the meaning of life and reconnect with what truly matters.
