When an infant boy is left for dead after his parents are killed in an attack by the evil Sharmarkyans, a magical spirit moose comes to his aid and saves his life. Taken in by a kind couple passing by, the child is raised as their own son and nicknamed "Moosinella." On the autism spectrum, he faces many challenges but soon becomes a courageous and strong vigilante.

Years later, Moosinella befriends a man who is sent to assassinate him but has a change of heart. Together they set out on a dangerous quest to kill the ruthless leader of the Sharmarkyans, King Kodiak, who threatens to destroy everything they care about in their homeland of Songerlondia.