Nancy Stokes (Emma Thompson) doesn’t know good sex. Whatever it may be, Nancy, a retired schoolteacher, is pretty sure she has never had it,  but she is determined to finally do something about that. She even has a plan: It involves an anonymous hotel room, and a young sex worker who calls himself Leo Grande (Daryl McCormack). Leo is confident, dapper, and takes pride in being good at his job. He also appears to be intrigued by Nancy — one of many things to surprise her during their time together.