When the body of a man is found completely destroyed in the swamps in Louisiana, the medical investigator Sam Rivers is assigned to investigate the murder. He travels with the biologist Mary Callahan to the location where the victim lived in a floating house and he meets his family and friends. They find that Chinese snake-heads genetically engineered that belong to a wealthy hunter are attacking and killing the locals. While the group fights to survive, the hunter Jeff arrives with his team to hunt the predators.
Girls Against Boys
After a series of bad experiences with men, Shae teams up with her co-worker, Lu, who has a simple, deadly way of dealing with the opposite sex.
In Manhattan, a bike messenger picks up an envelope that attracts the interest of a dirty cop, who pursues the cyclist throughout the city.