Lord Ashfordly plays host to a group of ex-offenders, who will be working on the estate under the supervision of Eric Grey as part of a rehabilitation programme. But not all of the young men are that keen on getting rehabilitated and only want to make trouble. For starters they steal Oscar Blaketon's car when he refuses to serve them at the pub. Dorothy Plum is complaining that someone is disturbing her little dog Marigold, but a search of her garden and the road outside turns up nothing. The old lady gets really worried when the dog disappears and she offers a big reward to get it back. Aunt Peggy is not a woman to let such an opportunity pass. She gets a similar dog with the help of an old friend and tries to return it to its "rightful owner" after a small makeover.