It’s the summer of 1941. Europe is at war, but New York's Thousand Islands are at the height of the tourist season. Kennet Fiskare, son of a hotel proprietor, is having the summer of a lifetime, having fallen deeply in love with a Swedish-Brazilian guest named Astrid Virtanen. But the affair is cut short and the young lovers permanently parted, first by Astrid’s family obligations, then by America’s entry into the war. The rigors of military life help dull his heartache, but when Kennet’s battalion reaches France, he is thrown into the crucible of front line combat. As his unit crosses Europe, from the Battle of the Bulge in Belgium to Mauthausen concentration camp in Austria, Kennet falls into a different kind of love: the intense camaraderie between soldiers. It's a bond fierce yet fragile, vital yet expendable, here today and gone tomorrow. Sustained by his friendships, Kennet both witnesses and commits the unthinkable atrocities of warfare, altering his view of the world and himself. To the point where a second chance with Astrid in peacetime might be the most terrifying and consequential battle he’s ever fought.