One day, a ghost (who isn't quite one) starts living in Chanyang's house. After trying to avoid him for several days out of fear, Chanyang finally gathers up the courage to confront him.

Chanyang is surprised to discover that she owes her life to him after he rescued her in the spirit realm. However, his help is not without a price. She must now help him uncover the person who sought out his death. With this, Chanyang's reluctant new life with a ghost as her roommate begins!