The fourth film of firefighter-turned-director Yang Shupeng, Blood of Youth follows a young hacker named Su Ang (Oho Ou), who anonymously tips off the police about the remains of a woman buried in the woods near the city of Hangzhou. Detective Zhang (Zhang Yi) discovers the victim was beaten to death almost two decades ago, and starts investigating the events that lead to her death.

Kongwen Lu is the author of a fantasy novel series following a heroic teenager, also named Kongwen, on a quest to end the tyrannical rule of Lord Redmane, under the guidance of a Black Armor. But through a strange twist of fate, the fantasy world of the novel begins to impact life in the real world, leading Guan Ning to accept a mission from Tu Ling to kill the author.

A world-class hitman ends up swapping identities with a down-to-luck extra actor during an accident.