After leading a successful rescue operation in Mombasa, U.S. Marine Ray Garrison and his wife Gina travel for a holiday at an Italian beachside town in the Amalfi Coast. However, they are kidnapped by a group of mercenaries led by Martin Axe, who demands to know the source of the Mombasa hostage operation. Since Ray is not privy to this information, Axe kills him and Gina.
Ray is later resurrected by Rising Spirit Tech, a company that specializes in developing cybernetic enhancements for disabled US military personnel. The company's CEO, Dr. Emil Harting, tells Ray that he is the first successful candidate that they have resurrected using a special nanite technology. Ray is also introduced to Dr Harting's other patients including former US Navy diver "KT", whom he strikes a friendship with, and former service members Jimmy Dalton and Marcus Tibbs, with whom he gets on poorly.