A scientist performing illegal stem cell research is trying to find a cure for cancer. After the transfer of shark cells is made into a human test subject, the ill man gets well again and it looks like the treatment was a success. But the experiment goes wrong, and the man transforms into monster: half-shark & half-human. But the scientist knows how to use this to his advantage. He has invited some of his old pals to the island and is hoping to take revenge on them with his new creature. But do they have any tricks up their sleeve?