The discovery of a corpse threatens to unravel a bumbling local politician's campaign for governor of Colorado.

Three young boys, Rocky, Colt and Tum Tum together with their neighbor girl, computer whiz Amanda are visiting Mega Mountain amusement park when it is invaded by an army of ninjas led by evil Medusa, who wants to take over the park and hold the owners for ransom. Kids and retired TV star Dave Dragon, who made his farewell appearance at the park at the time the ninjas appeared, have to break Medusa's vicious plans.

San Francisco Bay, January 18, 1960. Frank Lee Morris is transferred to Alcatraz, a maximum security prison located on a rocky island. Although no one has ever managed to escape from there, Frank and other inmates begin to carefully prepare an escape plan.