Nancy and Chuck find themselves on an island and discover a bottle. They open it, and from it emerges the Evil Demon of the Bottle, who has been trapped for 4,000 years and wants revenge on the one who trapped him. / Nancy and Chuck run into trouble while exploring some caverns. Nancy falls off of Kaboobie when giant bats attack the siblings. Chuck tries to find her but discovers underground creatures have taken Nancy hostage. Chuck must find her before he can summon Shazzan to help them escape.