The survival instincts of a road-tripping family are put to the test when they have no other choice but to stay the night at a remote homestead.

六個校園時期的密友，在難得的酷暑假期相約到遺世獨立的美麗小島出遊，本應是個充滿狂歡派對的愜意假期，卻因有人攜帶了來路不明的神秘毒品，讓整趟路程變調成一發不成收拾的血腥煉獄…。他們原以為能夠狂嗨翻天的毒品，事實上是一種新的…