| A boating trip turns into a nightmare for five teenagers when they happen upon an abandoned |
| yacht. Curious, the teens hop aboard, and two, Bob and Julie, decide that the yacht is a |
| perfect place for some illicit lovemaking, despite the presence of a bizarre biology laboratory. |
| Unfortunately, the amorous couple become infected with radioactive plankton, turning Bob |
| into a flesh hungry monster who greedily devours his lover. Soon, other monsters |
| have come up from the deep to hunt down the three remaining teens. |