In the last days of WWII, Germany, desperate for any last grasp to defeat the allied powers, looked to their last remaining weapons and soldiers. The Germany Navy and the last remaining U-Boats, were formed together for one last mission, a mission to attacked the United States Homeland, Operation Seawolf. Captain Hans Kessler, a grizzled submarine commander from both World Wars, is called into service to make one mission a success and help turn the tide of the war.