Then, on his way to find his madcap twin, Leif met a stranger who knew his name and who spoke of "the Fimbulwinter already upon us." Fimbulwinter! The dreadful winter that in Norse mythology preceded Ragnarok — the final war between the gods and the giants! Fimbulwinter — which presaged the Day of the Giants!
Leif Svensen and his brother were caught up in the destinies of a real but alien world. For if the giants triumphed, they would overrun Earth; and if the Aesir — the gods — won, Earth would be their footstool!