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.

In the time of the Qing Dynasty, the Emperor Yongzheng created a secret army known as the Guillotines. It was the job of the Guillotines to protect the Emperor by killing anyone who posed a threat to him or his rule. After 348 successful missions to eliminate their target, the 349th assignment proves to be their last.

During the Northern Song Dynasty, the Zhao family—comprising Zhao Buyou, his wife Wen Yue, and their three children—lives in Bianliang's Que'er Alley. Zhao Buyou, a lowly clerk, seeks a simple life, while Wen Yue is focused on improving their living conditions. Despite frequent disagreements, the family remains close. An unexpected event thrusts them into a significant case, leading them on a journey of personal growth and discovery, while uncovering deeper truths and protecting their community.

Chang'an. The city of Eternal Peace. China's ancient imperial capital and the world's most magnificent metropolis. Its treasures and wealth are now under siege from a mysterious army. In 24 hours the enemies will launch a devastating attack. While the nobles panic and flee, the city's most notorious criminal will be its savior!