Nel 1935, l'Unità 731 del Giappone conduce esperimenti disumani. Un medico cerca di liberare i prigionieri, compresa la sua fidanzata, dal campo mentre assistono ad atrocità.
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.
A female undercover detective from Japan goes to Hong Kong to investigate the disappearance of several young Japanese girls and finds that a drug ring is kidnaping and forcing young girls into prostitution.
