Men Behind the Sun 2: Laboratory of the Devil

Set in Manchuria, this film focuses on Unit 731, a secret Japanese military facility where prisoners are subjected to inhumane experiments and chemical weapon tests. A young doctor is stationed at the camp and becomes horrified by the atrocities he witnesses. The conflict intensifies when he discovers his fiancée is among the captives, having disguised herself as a Chinese prisoner to find him. He then attempts to rescue her and the other prisoners from the facility.

Directed by Godfrey Ho, this production followed his earlier films Ninja Thunderbolt and Ninja Terminator. It was released in 1992 as a drama, horror, thriller, and war movie produced by Artview Investment Co., Ltd. in Hong Kong and China. The screenplay was written by Simon Fong and produced by Ricky Wong Ka-Kui. The main cast includes Chu Kong, Yuen-Ching Leung, Gang Wang, and Wang Runshen.

Audience reception for the film has been mixed. On IMDb, it holds a rating of 4.4/10 based on 793 votes, while on TMDB, it has a score of 5.1/10 from 24 votes. This film sits in the middle of the director's listed chronology, appearing before Men Behind the Sun 3: A Narrow Escape and Mr. X.