The flick focuses on one group of girls working in a machine shop environment and there are a LOT of shots of drill presses and grinding wheels to emphasize the point. The girls are kept in line by being brutalized and raped by their male overseers. The plot revolves around a girl (Natsumi) who puts herself into this horrible factory to try to find her investigative reporter boyfriend who, similarly, had previously infiltrated the factory to do an expose article, and then disappeared.

The movie actually has its strength in the character development of the relationships that form between the group of captive girls as they confront their situation, spurred on by Natsumi's fresh energy. The female actresses are all very attractive--my favorite was the female overseer, Kurosawa (not sure who played her because the cast credits are all in Japanese)--there are numerous sex scenes (all of a coercive nature), and several of the captive girls have killer bodies.

This movie doesn't aim very high, but it does move right along through its relatively short play time and delivers a decent storyline along with the usual dose of desired gratuitous sex and violence. It's definitely worth viewing if you like lotsa' scenes of cute girls getting abused and close-ups of machining processes!