A group of friends attend a medical trial retreat. Run by the suspicious Dr. Feldman, they soon discover the shocking secret of why they are there.

After a violent thunderstorm scares a house party, the guests flee to a nearby home for shelter.. only to discover, a more sinister hand is at play.. Now, they can't escape the strangers home due to the thunderstorm, but they can't stay inside due to the danger that follows them.