Remake of the classic film tale of nature biting back. When flesh-eating piranhas are accidentally released into a summer resort's rivers, the guests become their next meal.

The private investigator Maggie McNamara from Lyon Investigation is hired by the wealthy J.R. Randolph to find his niece that has disappeared with her boyfriend. Maggie seeks out the lonely environmentalist Paul Grogan to help her to look for the teenager. They head to an abandoned army facility and Maggie decides to drain the pools to see whether the body of the girl is there. They are assaulted by a woman with a crowbar but they subdue her. However she escapes and soon they learn that the woman is Dr. Leticia Baines, who is researching a hybrid species of piranha that is capable to survive in fresh and sea waters for military purpose. Further, Maggie has release the piranhas on the river and they are heading to the Lost River Lake Resort. Maggie and Paul inform the corrupt local Sheriff but Randolph tells him to lock them up since he does not want to jeopardize the party he has promoted to his resort.—Claudio Carvalho, Rio de Janeiro, Brazil

Doctor Baines has been conducting genetic experiments on piranhas and has made them virtually unstoppable. Unfortunately, Maggie, a private investigator, and Paul, an environmentalist, while searching for 2 people who disappeared in the area, accidentally release the hybrids into the Lost River Lake threatening to destroy everyone in their path. Can they prevent the flesh-eating piranhas from escaping into the ocean and spawning?—Anonymous