The book tells about the combat path of the German submarine "U-124," one of the most productive submarines of the warring parties during the Second World War. Long campaigns of submariners, heavy watches in the stormy sea, opposition to attacks by enemy warships and aircraft, hunting for allied convoys - the author writes about all this in detail and spectacularly, based on documents and eyewitness memories, reproducing the history of the legendary submarine and drawing an accurate and vivid portrait of its commander, Jochen More.