Lil' Brad didn't believe in witches until he met one. The evil hag torments the fantasy land of Enchantia and has just summoned Brad from the Earth as an ingredient to her potion of eternal youth. Brad doesn't like this plan. And who would be better suited to rid Enchantia of the sorceress than a tender teen? A heavily armed mercenary? Yeah good point but there's none available I'm sorry. Brad'll have to do.
Starting in a prison cell you help Brad free himself and find his way on the ocean floor, through a medieval city, a junk yard and an ice castle.