From the early days of World War II, a German U Boat is sunk in Canada's Hudson Bay. Hoping to evade capture, a little band of soldiers headed by controlling officer Lieutenant Hirth attempts to cross the boundary into the USA, that has not entered the war and can be officially neutral. Along the way, the soldiers strike brave men such as for example Peter, Johnnie, a leader of a Hutterite farming community, for instance a fur trapper, a writer, Philip Andy Brock, and an priest.