At the new energy flagship launch event, intern Shen Zhiyao unexpectedly saw his father Shen Weiguo, who passed away six years ago, in the old experimental records of an impoverished elderly man without a QR code. Even more bizarrely, not only is a critical page missing from the accident archive of the incident his father participated in twenty years ago, but his name was also artificially erased. Determined to find out what his father actually did, Shen Zhiyao sacrificed his chance at full-time employment and teamed up with veteran engineer Gu Changhe, who has shouldered a bad reputation for twenty years, to pursue the investigation. From deleted safety parameters to vanished duty logs, and down to the old instructions personally signed by the founder, a truth hidden for twenty years gradually surfaces.