A British submarine on a mission to deliver supplies to Norwegian resistance fighters spots an unsuspecting enemy submarine in 1944. It's simply too good an opportunity to pass up.
In the icy waters off of Norway in 1945, a U-boat embarks on a mission to bring top-secret German technology to Japan, unaware that a Royal Navy V-class submarine has just been ordered to patrol the area. Neither commander manning their vessel realizes that they are about to face-off in the world's first underwater submarine dogfight. Witness the historic battle between HMS Venturer and U-864.
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