An experimental drug that is supposed to reduce aggression has the opposite effect on a baboon that is being experimented on by a group of medical students and their professor. While they are playing a fantasy role-playing game in their research facility, the baboon escapes and begins hunting them down.
在離開了弗羅里達之后，貝絲（麗貝卡·豪爾 Rebecca Hall 飾）來到了諸多淘金者心目中的圣地拉斯維加斯，在那里，她找到了一份酒吧女招待的工作。雖然生活和設想中的大相徑庭，但貝絲并沒有太多的精力去思考和抱怨，每一天，能夠吃飽，有地方住就已經是最大的奢侈了。 賭徒丁克（布魯斯·威利斯 Bruce Willis 飾）正是看準了貝絲這種渾渾噩噩的生活狀態，才會找到她希望她成為自己的搭檔的，沒想到，這個選擇卻為他帶來了千載難逢的好運氣。原來，貝絲對數字和概率十分敏感，在她和丁克天衣無縫的配合下，兩人在賭場中占盡了風頭，卻也惹惱了丁克那小心眼的老婆圖麗普.
A young man is found bruised, beaten and stumbling down a secluded road. As the police try to piece together what happened, the convoluted relationship between a young woman and her two suitors gradually emerges.