Our contemporary, Andrei Stolyarov, a young navigator, a graduate of the St. Petersburg Diving School, caught in a time loop, finds himself at the very beginning of World War II. Being a patriot, he did not even think about what to do. He is a submariner, and his place is on a submarine. I managed to swim, experience all the "delights" of the service on the "Baby." The explosion of an anchor mine - and he is the only one who miraculously managed to escape. But his war was not over.