For generations, there have been all kinds of wild rumors surrounding gangster Al Capone's hidden fortune and the mysterious amusement park he built. When three kids sneak into the rundown park on the hunt for Capone's loot, the attractions come to life and take the kids on a wild and dangerous ride beyond all imagination. Now to survive the night, they must team up with a friendly sea witch, find a secret underground ride and take on an evil mermaid, bloodthirsty pirates, a fire-breathing dragon and an armada of monsters. And all on a school night!