The beautiful Barbara Shelley is secretary to a dodgy businessman who has offices in a modern 60s building. She herself has a very expensive looking flat with a baroque Salomonic column, complete with vine leaves, in the middle of the living room.
One day another pretty young girl turns up - her sister has killed herself, after withdrawing £7,000 in cash, which is now nowhere to be found. She'd talked of investing it. Can the businessman, Paul Heinrich, explain?
The strangely impassive Miss Halston has only just heard of the death of her sister - she's been touring Europe as a fashion model. She's nice looking, but hardly in the model class. Both she and Barbara Shelley are dressed, and act, as if they were 50. It was an odd fashion moment! In about five years time they would have to relax and act as swinging, groovy chicks.
The plot thickens, involving an ex-con and Kenneth Cope as a sponging step-son. Barbara Windsor makes a brief appearance, and the lovely Gladys Henson cameos as a landlady.
The investigating officers obviously think they are funny - or else the director does - but they aren't.