这部作品讲述了萨曼莎和克拉拉的故事。她们是两名寄宿学校的学生，在假期期间留在学校，却必须在夜晚对抗不速之客以求生存。

　　When Chelsea and her friends get in trouble with the cops, they flee the city and go on the run. Fueled by a hallucinogenic drug called Echo, they hope to lay low-and get high-in an old family hideout in the woods.However, Chelsea has reservations about going back to nature and secrets she’s not sharing with her friends. When a shot rings out, her past comes crashing back, and the punks find themselves pitted against the local authority- an unhinged park ranger with a real axe to grind…