Two bacteriologists create a new deadly form of bacteria. When one of the scientists wants to destroy the abomination, the other has him killed. Realizing that as the creator he can control the bacteria, he sends the growing mass out to destroy and consume everything in its path.
Pat and Lorna Fuller are on their honeymoon cruise. The ship sinks and the couple is marooned on a tiny island populated by giant black ants. Pat and Lorna fight as long as they can, but are eaten alive in the end.