Based on true events set during WWII in Northeast China, an ordinary man is thrust into a turbulent fate against the backdrop of the inhumane bacterial experiments conducted by the Japanese Imperial Army's notorious Unit 731.

The widow of a famed general teams up with an impostor posing as her late husband and schemes to steal the secrets of an elderly master swordsman. Their plans are complicated by the master's grandson, who is himself torn between his filial duty and the affections of his adopted sister.

Boonie bears and Bald Qiang work together with secret primitive girl to smash a conspiracy to destroy old-growth forest.