Nine former schoolmates are invited to a cabin for a reunion, but their hostess commits suicide. They all try to find out the reason why.

The "universal soldiers" must fight the whole army, when the military's supercomputer S.E.T.H gets out of control.

An astronaut gets infected with alien DNA during the first mission on Mars and runs amok on earth. Preston and Laura team up with a peaceful, genetically re-engineered Sil to track the monster down.