Na-Bi (Seo Jun-Young) hopes to become a sushi chef and currently works under a sushi master. One day, he moves next door to Lee-Jung (Park Gyulee). Lee-Jung is a reporter for a travel magazine and lives with her cat Yamma.

Na-Bi has a secret. He is able to see the spirit inside of cats and can talk to the spirit. The spirit of middle-aged woman Ma Jang-Soon (Lee Young-Ran) lives within Yamma. Na-Bi often takes care of Yamma when Lee Jung leaves for work. Na-Bi and Lee-Jung also become boyfriend and girlfriend.