Story continued from Thor #349. It's snowing all over the world! Is this cause for celebration? Unfortunately not! It's cause for grave concern about the survival of the universe! When Thor stops by Avengers Mansion, he tells his teammates about the ominous situation they face! Surtur is sending his demon hordes, the Sons of Muspell, to Midgard in order to clear a path for the fire giant to invade Asgard! In the snowy streets of Manhattan, the Avengers along with the Fantastic Four and the Warriors Three clash with Surtur's powerful demon hordes! Story continues in Thor 350.