A handful of the world's top leading scientists have been working on a breakthrough cure for ovarian cancer "the silent killer" on an isolated cancerous cell in the finest medical testing facilities on an island in New Zealand. Little do they know the "cure" turns the cell they have been experimenting on into a dangerous life form with a mind of it's own and proceeds to take over one of the scientists as a host and imitates his every action and word with intent on spreading itself to the rest of humanity. With the only way to get to safety and to warn of the impeding danger to mankind is taking the first boat that ferries them off the island, they must survive till dawn while finding out just who exactly who is still themselves or "a silent killer."