Ghosts, Cormac and Lizzie, were burglars all their lives and now they can't get into heaven until the stolen goods have all been given back. But a silver tea-set is buried in the garden and no one else knows it's there. Cormac's cousin inherits the house so they ask his children, twins David and Dora, to do the digging. They don't realise that they were seen stealing the silver by John the Pots, a man of the roads, who wants the tea-set himself so he can claim a reward . . .