Tony and Tia are other-worldly twins endowed with telekinesis. When their Uncle Bene drops them off in Los Angeles for an earthbound vacation, a display of their supernatural skill catches the eye of the nefarious Dr. Gannon and his partner in crime, Letha, who see rich possibilities in harnessing the children's gifts. They kidnap Tony, and Tia gives chase only to find Gannon is using her brother's powers against her.

Made for TV movie and third Witch Mountain installment of the continuing exploits of the alien kids Tony and Tia. After news of the boy's amazing abilities surfaces Tony and Tia are sent to go find him knowing that the boy must be from their world. They are joined by an old friend Jason O'Day and a black cat named Winky. Together they race to find the boy before their old nemesis Aristotle Bolt does.

Tia and Tony are two orphaned youngsters with extraordinary powers. Lucas Deranian poses as their uncle in order to get the kids into the clutches of Deranian's megalomaniacal boss, evil millionaire Aristotle Bolt, who wants to exploit them. Jason, a cynical widower, helps Tia and Tony escape to witch mountain, while at the same time Tia and Tony help Jason escape the pain of the loss of his wife.

A taxi driver gets more than he bargained for when he picks up two teen runaways. Not only does the pair possess supernatural powers, but they're also trying desperately to escape people who have made them their targets.