Yang Xiao, a deliveryman who was heavily in debt, encountered a bizarre car accident during a late-night delivery and was bound by a mysterious system. When he woke up, he found that he had gained the ability to shuttle between Yin and Yang to deliver "takeout". In order to pay off debts and survive, as well as to solve the mystery of his own experience, he was forced to become a "delivery man in the underworld" walking on the edge of life and death. In one thrilling and strange delivery mission after another, he went deep into the bizarre underworld, met ghost partners who were both enemies and friends, and got involved in the power struggle between the underworld, changes in the underworld, and a huge conspiracy related to the balance between the two worlds. From the initial fear and resistance to gradually adapting and finding his own place, Yang Xiao eventually grew into a special being connecting yin and yang, and achieved self-salvation in the process, which also profoundly affected the pattern of the two worlds.
