After the fall of mankind, one man is left to rebuild. The world's other survivors, however, are vampires. Our hero is about to be added to the menu.

Scientists using nano technology to shrink objects to microscopic size use their science on a deadly shark, which is injected into a person's bloodstream in an attempt to cure a rare blood disorder. When the shark begins to do more harm than good, a team of adventurers enter the bloodstream in a shrunken submarine in an attempt to kill or be killed by the smallest great white of them all!