Materialist college student Tang Yu works part-time delivering packages, and one day receives a strange parcel addressed to himself. Inside Room 404 of a run-down apartment building, he hears his own voice coming from behind the door. The building manager insists that he “just came home.” Meanwhile, in the undelivered parcel by the bed, a blank notebook begins to bleed, revealing a question written in his own hand: “Do you believe it now?”
