When young Hetty goes into service at Longton Hall, she falls victim to the depraved appetites of her master, Sir Victor. Lady Alice, suspecting her husband of debauchery, persuades Hetty to disguise herself as a man and spy on him. Pretending to be 'George', her fictional brother, Hetty is obliged to take part in Sir Victor's licentious revels. But she has a secret ally in Leo, his son. Hetty and Leo are increasingly involved in the dark doings of the lecherous lord, enduring all kinds of humiliation, and they plan to escape. But Leo still doesn't know that his beloved Hetty is also George, his best friend...