During the shut down and destruction of the Japanese test camp Squadron 731 in Manchuria, a soldier becomes infected with a virus developed during the camp's testing and risks spreading it into Japan on the train ride home.

FBI agent Tracey Pride is on a mission to capture businessman Jason Slade, who is involved in extortion and murder. Teaming up with her is her sister, Joyce, a news reporter; Dragon Lee, Tracey's partner in Hong Kong, and Jake, a bodyguard who worked for Slade. Can they stop Slade before it's too late?