Ai Li, 18 y.o. high school student, meets her dead end. Her family went bankrupt and forced to take a huge loan, yet non of them care to pay the loan they had. She tried her best to prevent her family become homeless. Alas, the payment deadline is getting closer but everything remains the same. Ai Li becomes desperate, thus she attempts to take her own life. A ghost stops her and offers her to seek a help to his master for paying her debt. Ai Li agrees and her journey in the underworld begin.