As the grim years of the Second World war go by, the destruction of Allied shipping mounts. Out of the terrible loss of men and ships, the escort carrier is born. They were typically half the length and a third the displacement of larger fleet carriers. While they were slower, carried fewer planes and were less well armed and armored, escort carriers were cheaper and could be built quickly, which was their principal advantage. At twenty-six, fighter pilot Tim Rowan, RNVR, is already a veteran of many campaigns. Now he joins the new, American-made escort (or "jeep") carrier HMS Growler, the flagship of a task force protecting Allied convoys sailing the Arctic route to supply Soviet Russia. The service in the Arctic is harrowing, and not all of Rowan's adversaries are German. In late 1944, Growler is transferred to the Indian Ocean and faces the Kamikaze, experiencing vicious onslaughts.