Before being sent to serve in Vietnam, two brothers and their girlfriends take one last road trip, but when they get into an accident, a terrifying experience will take them to a secluded house of horrors, with a chainsaw-wielding killer.
A group of student activists travels to the Amazon to save the rain forest and soon discover that they are not alone, and that no good deed goes unpunished.
Three girls are kidnapped by a man with a diagnosed 23 distinct personalities. They must try to escape before the apparent emergence of a frightful new 24th.