Diana (Zosia Mamet, Girls) moves back to New York City and lucks into the perfect brownstone apartment in Brooklyn. But on her first night there she notices a too-familiar name on the mailbox downstairs - her ex-boyfriend Ben's (Matthew Shear, Mistress America). Diana is determined to be friendly with Ben, but run-ins with him and his new girlfriend (Sarah Ramos, Parenthood) make it impossible. Instead, Diana is left to casual-stalking, flashbacks to their time together, and trying to answer the timeless question - can you ever be "just friends" with your ex?