Niko Tatopolous was calmly collecting samples on a rainy, gloomy day near Chernobyl. Studying the adverse effects of radiation on the environment, Nick sang pleasantly as he extracted radioactively enlarged earthworms from the soil. Little did he realize, half way across the world that another creature had mutated due to the unforeseen effects of radiation. This monster had attacked a Japanese fishing trawler, prompting the US government to take immediate action. Someone was needed who could diagnose and perhaps cure this mysterious situation.

The Piasecki H-21B helicopter descended gracefully behind Nick as he continued to collect routine samples. Emerging from the helicopter, a government agent spoke to Nick, and revealed to him that he was being reassigned. Aboard the Piasecki they climbed, preparing to investigate this strange phenomenon, completely unaware of the devastation that would soon follow...