At an underwater oil field base located in the vast ocean, a severe typhoon suddenly blew up, followed by staff disappearances. The head of the base, Jim, seemed to have sensed some hint, and while searching for the missing persons, he was scratched by the claws of a mysterious monster and his body exploded to death. Afterwards, the employees were eaten by the mysterious monster one by one. So, in the isolated base, the staff united and took up arms to resist. Can they finally escape from here successfully?