Six friends venture to a remote island off the Washington coast to celebrate the fourth of July, but their expectations for a harmless weekend filled with fun and partying goes awry when one of the drugs they take spawns a horrifying trip filled with chaos and murder.
Only the friend who refused to take the drug is spared and she must now fight to stay alive as everyone around her, including her fiancé, attempts to kill her.
Her only hope may be a rookie detective who has been on the trail of the sadistic right wing terrorist organization that secretly engineered this bio-active drug that transforms everyone who takes it into ravenous psychopaths.