Pen Tennyson co-writes and directs this British wartime drama. While escorting a convoy during WWII, Royal Navy cruiser the HMS Apollo, commanded by Captain Armitage (Clive Brook), is nearly lured into a German U-boat ambush using a refugee ship as bait. However, the plot is foiled by the arrival of a North Sea Patrol ship. The Apollo’s adventures are not over yet though, for German pocket battleship Deutschland is en route to destroy the convoy. It is up to the Apollo and her crew to make a valiant last stand and endure the enemy’s fire long enough for them to get through.