Zhou Chen volunteers as a missing-persons searcher on the last subway train. Using fragments of the future, seven seconds at a time, he finds people who have gone missing, only to discover that his own name is on a missing-persons list from three years ago. To uncover his identity, he takes over an old ancestral shrine, trading foresight for clues and gathering society's outcasts to build a search-and-rescue base. A cold-chain business owner uses missing people as leverage to control the underground routes, while every use of Zhou Chen's foresight costs him a piece of his past. A ledger, oxygen-cylinder numbers, and a keepsake from the shrine become the keys to turning the tables. But when he sees himself willingly stepping into that subway car, who can he still trust?
