Toothsome Tracy Reed (remember her in Dr. Strangelove and A Shot in the Dark?) heads the cast of Deadly Females. The ladies in question are female assassins, specializing in knocking off lascivious males. Like the proverbial black widow spider, the girls lure their victims with promises of sexual favors, then strike when said victims are exhausted. Naturally, this requires plenty of exposed female flesh.

The year is 1904; the setting is Cockshute Towers, one of England's stateliest homes. When the household is threatened with bankruptcy, both the masters and the servants are prepared to co-operate in trying to find some cash - after all, most of them are enjoying liaisons of one kind or another among themselves, and none have any desire to give up their rewarding way of life...

Accident-prone Gil wants a steady job but is dismissed by every company that recruits him due to his unfortunate habit of ending up in sexually embarrassing situations. His girlfriend Annette says that she will marry him only if he can stay employed for at least a week. Hired by Mr Grimwood's cleaning company "Here To Service You", Gil is unwittingly drawn into a series of bawdy misadventures: sharing a bath with a married woman and getting caught by her husband; having a threesome with a hospital patient and a woman doctor, followed by a foursome with Annette, Grimwood and a woman psychologist; awkward encounters with a gay man and a lesbian; and getting caught by Annette playing strip poker with a group of women. Incredibly, Gil remains in his job and Annette marries him, but before the couple can have their wedding night Gil collapses on the bed and passes out from exhaustion.

Young Timmy starts as a window cleaner in the little company of his brother. Soon he learns that some female customers expect additional service. Young and curious as he is, he reluctantly accepts the juicy duty. However his heart belongs to Liz, who demands the highest commitment until she lets him go all the way.