On February 5, 1945, in the depths of a Norwegian fjord, UBoat U864, helmed by Captain RalfReimar Wolfram, thundered out of Bergen on a mission that could shift the tides of World War 2. With the Axis powers teetering on the brink of collapse, the Nazi war machine was banking on U864 to deliver a cache of cuttingedge military tech promising to supercharge the Japanese war effort.

Packed with the blueprints and parts for Jumo 004 turbojets, the makings of a nextgen Japanese jet fighter, and the critical components of V2 ballistic missiles, not to mention a contingent of toptier engineers versed in this tech, U864 was a steelclad lifeline for the Axis.

However, Captain Wolfram and his crew soon steamed blind into a lethal trap. Having cracked the Enigma’s secrets, the British had U864 in their crosshairs. HMS Venturer, a topoftheline British submarine, was on the prowl, tasked with a single objective: to hunt down U864 and consign her and her secrets to the abyss.

As Wolfram plunged into the frigid waters, the weight of the entire conflict bore down on his shoulders. HMS Venturer’s ASDIC sonar pinged through the depths in a desperate bid to find its target, gearing up for an unprecedented duel beneath the waves. History was about to witness the only underwater submarine clash ever recorded…