Dr. Adela, a mature lesbian with a penchant for voyeurism, finds herself drawn to the moans echoing through the clinic. She peeks into a patient room to find a young mistress and her bound slave locked in a passionate, lesbian embrace. The slave, a willing participant, is spread-eagled on the bed, her body trembling with anticipation as the mistress teases her with a feather, then replaces it with her own skilled fingers, bringing the slave to a shuddering, vocal orgasm.