When the apocalypse arrives, nuclear fallout clouds swallow the last of human civilization. Yan Jin uses himself as bait to trigger the underground reactor's self-destruction, all to buy Ji Yao three seconds to escape. He vanishes in the white light without leaving any last words, pressing only a charred pocket watch into Ji Yao's palm. Inside is a photo of the two of them in the old laboratory. Three years later, Ji Yao travels alone across the radioactive wasteland, searching every ruin for the man who should be dead. But people say Yan Jin is long since a legend, a ghost wandering through nuclear dust, a living taboo. Until one night, behind a broken wall, Ji Yao hears a familiar heartbeat and the words the wind tears apart: "As long as you're alive, that's enough."
