Lin Letian, an ordinary young man, accidentally broke into the spirit world due to a supernatural incident and was involved in an extra-dimensional adventure that was intertwined with absurdity, humor and danger. With wit and humor, he got to know the little ghosts Douding, Hong Ling, Fat Tou Tuo and other ghost partners, and was pursued by Mr. Impermanence, the law enforcer in the spiritual world. In order to return to the human world and to uncover the truth about life and death, Letian and his partners compose a journey of friendship and growth that spans life and death. They take risks throughout the spiritual world to break situations, compete with forces, discover their own hearts, and finally help the spiritual world restore balance and face the true meaning of life and death. The book completes growth and self-liberation with a joyful and humorous rhythm, bringing out warmth and philosophy.