AllMovie

Nelson (Richard Basehart) is conducting Brynov (Edward Asner), the ex-premier of a hostile country, to safety when the escape is detected. The boat they're aboard is blown up and the two, along with a handful of other survivors, end up stranded on a life raft in mid-ocean. With both the Seaview and enemy vessels hunting for them, and a potential traitor in their midst, the admiral discovers precisely how Brynov managed to secure and hold onto power.