In a dystopian future, Europe is unified under a totalitarian patriarchy, where each town is assigned a single economic purpose. In Brendovery, Wales the occupation is prostitution. Arriving by train from London is Billy Hampton, a young American expatriate and draft evader (Bill Paxton in his first lead role), ostensibly there to enjoy a sex-filled holiday. Unknown to him he is a time bomb assassin, programmed by a feminist terrorist cell to assassinate the local minister of prostitution.

霍特石油公司的鑽油平台失聯，引起外界高度關切。同時，安東妮特帶領學生校外教學時，發現許多離奇死亡的動物屍體，隨後在遙控下潛器輔助下，偵測到海底熔岩。不久，前夫布萊德前來告知，有人洩漏安東妮特的研究資料，並表示其開採樣本的化學成分與海底熔岩相同。就在此時，蒸氣海嘯現身邁阿密海岸，安東妮特將如何阻止悲劇發生？