Geneticist seeks to make a name for herself by saving the planet from disease by using eons-old antibodies, harvested from enlarged six legged creatures. The creatures don't like being big and escape. Send for help.

An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.