The top agent Shen Haoran, codenamed "Night Owl", faked his death and escaped in order to track down the most lurking "Mole", and transformed into an ordinary archivist. When the family of his newlywed wife Fang Shixi is involved in a top-secret deal, and when the guns of his former comrades are quietly pointed at his back, he must tear off all disguises in the silent dark night and ignite a fire that burns away betrayal.