Down on their luck and needing some quick cash, struggling young lovers Tom and Eve lie about their relationship in order to enter THE MILLENNIUM PROJECT, an experiment for married couples run by the mysterious Director and Handler. With the promise of $50,000, Tom and Eve must survive 30-days isolated together in a futuristic smart home, while the researchers attempt to determine why couples fall out of love. Over the course of their stay, Eve begins a violent decent into madness as she questions if her lover really is the man she thinks he is.

A paranoid sci-fi thriller about the nature of trust in relationships, The Honeymoon Phase is as much classic Twilight Zone as contemporary Black Mirror, and an all-too-terrifying answer to the question, "How well can you ever really know someone?" - Young lovers lie to get into a project for married couples.