The Alexander Hamilton Foundation in Washington, D.C. needs someone to escort a Chinese defector from Shanghai, China to America. The defector has vital top-secret security information for America. Lieutenant Commander Pilar Marshall volunteers for this clandestine assignment. At the final pickup point off the coast of Shanghai, a submarine is to collect the defector. Suspense builds as they move through the city to the marina, followed by an unknown watcher. As they are ready to cast off from the dock, the watcher appears with a gun. They scuffle with the watcher who is knocked down. He fired one shot, which hit a member of her team. They escape to the pickup point. To avoid being caught by the Chinese patrol boat, they hide in the coastal fog. Little do they know, there is no submarine to pick them up. A zodiac picks up the group to a waiting U.S. destroyer. One member of the group is a Chinese sleeper spy. The spy accompanies the team to America. In a tense scene, the sleeper spy locates the defector. With dangerous aim, does the assassin accomplish her task?