Penelope Prentice lives two lives: one, a professional physiotherapist of good standing in her local community; the other, a dominatrix who caters to the psycho-sexual needs of discreet clientele in her basement dungeon, affectionately known as 'Hell'. But her colourful existence is brutally threatened by a criminal gang who usurp her practice. With only her friends to help, she is slowly sinking into despair when a stranger arrives on the scene.