Dr. Bill Harford and his wife, Alice, are a wealthy couple living in New York City who seem to have it all: a happy marriage, a daughter, and a luxurious lifestyle. One evening, at a lavish party hosted by one of Bill's wealthy patients, Alice confesses to having had sexual fantasies about another man, throwing Bill into an introspective turmoil about fidelity, trust, and desire. This revelation leads Bill on an odyssey through the night, as he encounters a series of increasingly surreal and erotic situations. Struggling with his own desires and the temptation to breach the vows of his marriage, Bill's journey is a deep dive into the underbelly of sexual and moral ambiguity.

Bill's quest takes a dark turn when he learns of an exclusive, clandestine gathering where masked attendees engage in anonymous sexual activities. Curiosity drives him to seek out and infiltrate this secret society, but he quickly finds himself in over his head. As he delves deeper into this hidden world, the lines between reality and fantasy begin to blur, and Bill is forced to confront the consequences of his actions. His nocturnal adventure tests the limits of his understanding of freedom, pleasure, and the complexity of human relationships, pushing him to the edge of danger and beyond, until he realizes the high price of his voyeuristic escapades.