According to urban legend, there is a late-night bookstore that is only open from midnight to four in the morning, called "Passlife Building". It is said that lost people can buy "underworld contracts" here that can communicate with the souls of the dead, and get their wishes granted.
College student Lin Wan, in order to find her missing sister, stepped into the Tower of the Rebirth with a ghost deed in hand. The shopkeeper made a cruel deal: she must stay here for seven nights, fulfilling the last wish of a dead soul every night. If it succeeds, you can know the whereabouts of your sister; if you fail, it will become a new collection of the bookstore.
However, Lin Wan soon discovered that the request from the dead soul was far more terrifying than she imagined, and every time she fulfilled a wish, she would lose a memory of her loved ones. When the seventh night comes, will she still remember why she came? And what is the real purpose of the smiling shopkeeper?