The gang comes up with a plan. Fred, Shaggy and Scooby enter the tomb and discover Rock Rivers, who has been turned to stone. Meanwhile, Von Butch is kidnapped by the mummies. Shaggy and Scooby disguise themselves as mummies to sneak in but are soon discovered. Cleopatra arrives and turns Von Butch's minions to stone. Fred signals and Daphne, dressed as Cleopatra, leads an army composed of the citizens of the Lost City into Cleopatra's tomb. In the chaos Von Butch sneaks into the chamber, stealing the crown of Cleopatra and causing the Nile River to burst through the tomb, un-damming the Nile and flushing out the riches hidden in the tomb, thus restoring the treasure to the people of Egypt, according to Cleopatra's last wish.