An extraordinary story of survival and alliance during World War II: the icy journey of four Allied ships crossing the Arctic to deliver much needed supplies to the Soviet war effort.

On the fourth of July, 1942, four Allied ships traversing the Arctic split from their decimated convoy to head further north into the ice field of the North Pole. They were seeking safety from Nazi bombers and U-boats in the perilous white maze of ice floes, growlers, and giant bergs. Despite the many risks of their chosen route, the four vessels had a better chance of reaching their destination than the rest of the remains of convoy PQ-17. The convoy had started as a fleet of thirty-five cargo ships carrying $1 billion worth of war supplies to the Soviet port of Archangel--the only help Roosevelt and Churchill had extended to Joseph Stalin to maintain their fragile alliance against Germany. At the most dangerous point of the voyage, the ships had received a startling order to scatter and had quickly become easy prey for the Nazis.

The crews of the four ships focused on their mission. U.S. Navy Ensign Howard Carraway, aboard the SS Troubadour, was a farm boy from South Carolina and one of the many Americans for whom the convoy was a first taste of war; from the Royal Navy Reserve, Lt. Leo Gradwell was given command of the HMT Ayrshire, a British fishing trawler that had been converted into an antisubmarine vessel. The twenty-four-hour Arctic daylight in midsummer gave them no respite from bombers or submarines, and they all feared the giant German battleship Tirpitz, nicknamed the "Big Bad Wolf." Icebergs were as dangerous as Nazis as the remnants of convoy PQ-17 tried to slip through the Arctic to deliver their cargo in one of the most dramatic escapes of World War II. At Archangel they found a traumatized, starving city, and a disturbing preview of the Cold War ahead.