Pick young Sid or Sally to help professor Laslow stop his evil student Lodius, who had stolen the professor's magical medallion and turned all animals into stone before shattering the medallion into seven pieces. Ride Laslow's pet Mortimer, a giant sentient cyber-snail with mounted laser weapons, who also serves as the comical relief and fight Lodius evil minions throughout various rail shooter sequences. In between these sections, meet some friendly animals and solve a few singing puzzles to get medallion pieces. Finally, reach Lodius' dark fort castle where he keeps the key medallion piece that can undo all of his misdeeds.