Two Jewish brothers plan futures full of achievement and maybe fame. But Warsaw in the summer of 1939 is no place for dreamers.   Ian is thrown west to Paris. There, he unexpectedly falls in love with Alicia, a mysterious Frenchwoman, but then must leave her to race across France to safety in Casablanca. Daniel ends up in the Siberian Gulag, where he faces endless blizzards, starvation, and the often-lethal cruelties of guards and fellow prisoners. He too finds someone, an exiled poet named Nadhya, until he must choose: stay with her or cross all of Russia to return to the future he'd envisioned.