The story traces the sexual awakening of Heather, a tasty young virgin who leaves her convent to join in an arranged marriage with Frederick, a gardener's son.
Much of this awakening is induced by Heather's lecherous Aunt Phyllis, who tells her about some, if not all, of the mysteries of lust.
However, the newlyweds are soon told that they are brother & sister and therefore, cannot consummate their union - which leads to all sorts of bizarre perversions and debauchery with a host of horny supporting characters.