It tells the story of a Grim Reaper who borrows a human’s body and falls in love with a woman. After falling in love, he will break the rules of the heavens and be erased from the memories of everyone on earth... Black is a detective possessed by the Grim Reaper. The Grim Reaper Black is cold, but sometimes acts irrationally. Ha-Ram can see the shadows of death. Kang Ha-Ram seems like a recluse and finds it difficult to communicate with other people, but in reality she is very tender-hearted and emotional. These two fight to save people’s lives, even if it means breaking the rules of heaven. Yoon Soo-Wan works as an A&E doctor and is a mysterious figure. Oh Man Soo is the son of a chaebol; he is handsome and has a gift for words.