His wife's BDSM fetish has him on his knees, literally and figuratively. She's transformed from his loving partner to a cruel mistress, delighting in his degradation. She demands he wear a chastity device, forbidding him orgasms. She makes him service her and her lovers, a constant reminder of his place. Yet, amidst the pain and humiliation, he finds a strange comfort, a sense of purpose in serving her.