北极冰山的崩塌释放出一只巨大的螳螂，自史前时代就被困在假死状态。 它首先攻击军事前哨以吃掉他们的居民，然后前往华盛顿和纽约的温暖纬度。 一位古生物学家与军事单位合作试图杀死它。

In a post-nuclear, oxygen-ridden future, humble cleaner Juliette has her loyalties tested when she falls for Adam, a captive merman whose gills are mankind's last hope for survival.