Five college friends choose to spend their vacation debauching at the riverside. They find the perfect place to camp out, but end up crossing paths with twin brothers, Simon and Stanley. The twins then begins to knock off the campers in some extremely creative (and extremely gruesome) ways.

Tyler and his brother find an alien ship which makes Tyler appear older and gives him other abilities. This turns his high school life upside down, and may enable him to help his older brother's love life. After he is abducted by beings who intend to takeover Earth, he must depend on his inept and lovelorn brother to rescue him.

一对儿情侣本打算要度过一个浪漫假期，却不料被一股邪恶力量带入深渊.....

建立于一百年前的埃克赛特疗养院曾经收治许多心理有障碍的青少年，此后入院治疗的病患逐渐攀升，医疗条件则每况愈下，甚至不断爆出青少年被虐待致死的丑闻。如今该疗养院早已废弃，此地闹鬼的传闻却越传越凶，当然这无法吓退那些寻求刺激、胆大妄为的年轻人。某天，帕特里克（Kelly Blatz 饰）和好友罗里（Michael Ormsby 饰）、诺尔斯前往该疗养院参加这里举行的狂欢派对。年轻人们寻欢作乐，各取所需。一夜狂欢过后，从酒精麻醉中渐渐醒来的年轻人们闲聊打屁。稍后众人挑战禁忌，举行招魂仪式，结果见到了超自然的一幕。
未过多久，罗里仿佛被恶魔附体一般狂暴凶悍，而更为恐怖的经历还等在后面……

When the citizens of a small evangelical town systematically begin committing suicide, a young girl struggling to reconcile her Christian upbringing with her desire to experience the outside world finds her faith put to the ultimate test.

Donna's senior prom is supposed to be the best night of her life, though a sadistic killer from her past has different plans for her and her friends.