To combat rising attacks by communist terrorists, Japan has created a special security force authorized to use lethal force. Angel, the newest member of the force, fights to take down the terrorist group, Red May. Accidentally uncovering ties between Red May and the government, she and the rest of the Special Security Force are targeted for execution by 3 "hunters", enhanced psychics, working for the government. Together with her cybernetically enhanced partner, Raiden, it is up to Angel to stop them.