19-year-old Moritz and Hannes have been best friends ever since they were kids. Everything changes the day Hannes is the victim of a motorcycle accident and falls into a coma. Moritz is convinced that his friend will wake up soon.

Season 3 follows the fortunes of a young U-boat crew as they engage in the Battle of the Atlantic, are hunted down by an obsessed Royal Navy Commander (Ray Stevenson) and are sent on a dangerous mission to the Southern Hemisphere. Together they form strong personal alliances under the command of Robert Ehrenberg (Franz…