Lin Yu is an ordinary delivery rider with nothing to his name and a monotonous life. One day, while making a delivery, he unexpectedly receives a mysterious order directing him to a remote address. During the delivery, he suddenly discovers that he has gained a bizarre ability: he can briefly travel through time and space. Lin Yu realizes that not all the delivery riders around him are friends. Some have been bought off by evil forces and turned into undercover spies and saboteurs. They are trying to overturn the existing order and use supernatural abilities to achieve sinister aims...
