Television movie about the sinking of the Britannic, the sister ship of the Titanic. In 1916, the Britannic sank under mysterious circumstances while in service as a World War I hospital ship. It was later revealed that the Britannic was secretly carrying munitions to British troops. The movie focuses on the tale of survivor Vera Campbell, a British agent on a mission to capture a German spy. Campbell, posing as a governess to the children of Lady Lewis, falls for a man named Reynolds, unaware that he is an enemy spy. Meanwhile, the ship sails to its fate.