诉说了一个发生在20世纪初的故事:一位科学家发明了时间机器,试图通过它回到过去,拯救因车祸去世的女友。他成功地赶到了车祸发生之前,并阻止了悲剧的发生。然而,他没有意识到这一行为扰乱了宇宙原本正常的运行轨迹。数百年后,这种干扰导致了月亮偏离轨道,最终撞击地球,毁灭了人类的高科技文明,并让人类社会倒退回史前时代。
在这场灾难中,一部分人类为了躲避灾难,长期生活在地下。随着时间的推移,这些地下生存者逐渐进化成了具有攻击性的生物,它们甚至开始捕食地面上的人类,形成了所谓的吃人怪兽族。。Bandits led by Matt the Mute enter a bar and kill multiple people. Randy Bowers comes to town and is framed by Matt the Mute, who is working with the sheriff, who doesn't know that Matt is really a criminal. Matt the Mute writes out everything he wants to say. Randy escapes with the help of Sally Rogers, the niece of the dead owner of the bar. Bowers runs from the sheriff, and ends up in the cave in which the bandits have their hideout. They kidnap Sally, who escapes with the help of Bowers. Matt the Mute is killed when he enters the bar, which is filled with explosives, and the niece marries Randy.。