For some, the Western trail was a destination for oppurtunity and adventure. For others, it was the centerpiece for danger and despair. When ex-lawman Preston Biggs is hired to escort a group of women suffering from prairie fever back to civilization, they are met by a killer gang intent on stopping their passage. With a seemingly impossible journey ahead, the group finds one last hope when they are joined by a beautiful woman who has the firepower and the will to match anyone. 地震学家杰克与未婚妻凯伦前往湖边小镇度假，却意外在湖边发现一具焦黑的尸体及疑似爆炸烧毁的游艇残骸后，原来不远处因开採疏失意外挖掘出了一条埋在地底深处的鋰矿脉，鋰矿只要一接触到水就会马上引爆火焰，而这条矿脉竟然就埋在湖底下！ 小镇地底四处窜出致命毒气，引爆无坚不摧的炬火，正当军方下令封锁此地区时，赶来支援的两名科学家─也是杰克的好友却因爆炸引发的地震身陷鋰矿坑内！杰克深入地底救援，他必须赶在爆炸前阻止这场浩劫，拯救小镇村民的性命。 
