An estranged family take a trip to the desert in their used RV and become stranded and isolated in the scorching terrain. They soon learn their RV holds terrible, haunting secrets, and it starts killing them off one by one.
In order to lighten up her uptight family, the free-spirited daughter of a conservative politician brings weed-infused salad dressing to their Christmas Eve dinner. Chaos ensues when everyone gets unknowingly high, revealing the family's innermost secrets.
