Young Thor is destined to wield the mighty war hammer Mjolnir, but he can''t even lift it, much to the amusement of his friends, Sif and Balder. But when his jealous half brother Loki sends monsters to bedevil the three, his plan backfires by raising the All-Father Odin''s esteem for the young trio who he then sends on a Quest that will bring them even greater glory.