The members of the Davison family are looking forward to a nice, quiet vacation in Missouri enjoying one another's company in honor of the parents' wedding anniversary. However, family tension is already poisoning the trip, and any hope of a tranquil family reunion is cut short when a gang of axe murderers busts in to make all kinds of trouble. The terrified family seems to be totally under the thumb of these crazed outlaws. However, it soon transpires that one member of the family has an unusual skill set that is well matched against these accomplished killing machines. As family member's begin to drop dead in a variety of gruesome ways, it is up to newcomer Erin to outwit, outrun and outmaneuver the bloodthirsty invaders.