In order to find out the reason why she was killed, a female ghost possessed another person with a completely opposite personality to her. While finding out the reason why she was killed, she also completed a relaxing and romantic love, which made her whole life complete. The heroine is a ghost, an 18th-tier female artist who possesses an ordinary fat woman and becomes an assistant. She also successfully transforms her entire appearance and helps her become a successful person. The male protagonist is the director of the company. He is harsh but kind-hearted, has a sharp mouth and a heart, and is very handsome. There are two clues in the story, one is the clues of the heroine and the hero, and the other is the clues of the heroine's investigation.