Doctor Baines has been conducting genetic experiments on piranhas and has made them virtually unstoppable. Unfortunately, his assistants, Maggie and Paul, accidentally release the hybrids into the Lost River Lake…

When flesh-eating piranhas are accidently released into a summer resort’s rivers, the guests become their next meal.

Wildlife photographer Terry and her brother Art go to Venezuela for a photo shoot. They hire Jim Pendrake to guide them through the jungle. However, the trio run afoul of…