Both females lead get into a car accident which bring her into a coma so her soul have a time limit to accomplish some missions to go back into her body otherwise she die.
All that with the help of a Reaper who forgot all is past life as a human but start to remember step by step...

Both of them got a documentary format which follow our main lead couple story. Moreover the documentary take place twice which leading the female lead and the male lead to be reunited a second time. For both are a love to hate and again to love romance.