Tea-Rooms on the Cornish Coast owned by sisters Deirdre and Agnes. (In their late seventies) Drug-dealer motorcyclist loses package of dope in Tea-Rooms Gardens. Dope handed in to Deirdre. Wife-beater follows wife and her mother into Tea-Rooms and causes scene. Chauffeur Sam (Ex-heavyweight) calms man down. Agnes takes dislike to man and spikes his tea with dope, man dies. Body disposed of down hole at cliff top onto sea below.Drug-dealers come after dope and seven of the gang suffer the same fate, with Sam's help all are taken and propped into the sea. The Regional Crime Squad, even the Bomb Squad are sent for, but the sister's (and Sam) get off SCOTT FREE (TRACES OF ARSENIC AND OLD LACE) The whole thing is HILARIOUS