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Boy is sent to steal the heart of a menagerie-owner's collection being auctioned off after his death, but instead Maharajah the elephant saves the grimy pick-pocket from toppling off his hiding spot.
Maharajah's new owner spins a fantastic tale around the two, casting Boy as Danny, an Indian prince, and takes a bet they can walk the elephant to Manchester in 7 days.
They face obstacle after obstacle, even sabotage and Maharajah is severely wounded, but in the end, Danny discovers his true identity, and his thief's heart is stolen.