Death Do Us Part

A disheveled woman in a bridal gown is found stumbling along a highway, and is brought to a ranger station. As they wait for the sheriff, the only on-duty ranger asks the woman her name, and what happened to her. The bride refers to herself as Kennedy, and the film flashes back to the previous day, to when Kennedy, her fiancé Ryan, Kennedy's half-sister Hannah, their friend Emily, Ryan's cousin Derrick, and Ryan's friend Chet travelled to a secluded cabin for a Stag and doe party.