In 1876 Wyoming, the gun is the only law. And for Duncan and Suzanna McKaskel, newly arrived settlers beset by outlaws, rugged frontiersman Con Vallian is the only hope.

The Turtles and the Shredder battle once again, this time for the last cannister of the ooze that created the Turtles, which Shredder wants to create an army of new mutants.

Once again, Bastian is transported to the world of Fantasia which he recently managed to save from destruction. However, the land is now being destroyed by an evil sorceress, Xayide, so he must join up with Atreyu and face the Emptiness once more.