A young woman named Isabella receives an invite to a party in the swampland. Heeding the warning from a local tour guide that something sinister is taking place in the marshes, Isabella and her friend Gretchen press on. Soon after they are captured and find themselves prisoners of a deranged scientist and his ghastly creations. Now it’s up to Isabella’s sister and her husband, along with a researcher, to locate the whereabouts of the mysterious laboratory before the young women are transformed into part of a flesh-eating army!