Robert is everything that the residents of Windsor Hill Gardens, an exclusive gated community in the English countryside, could want from their head of security. He's always available to help with any problem, even if it is outside of his job description. He sees everything that goes on behind closed doors and knows all of the wealthy resident's secrets. He is well aware that their perfect lives and happy marriages are nothing but a façade. What none of them realise is that their reliable security guard is holding onto secrets of his own.

During the week of the community's fiftieth anniversary celebration, Robert's life is turned into turmoil. The police show up to spy on one of the residents suspected of committing fraud, he notices his employees are secretly holding a gun, and suspicious people are hanging around the estate. Even worse, a face from the past threatens to spill Robert's secrets. But Robert is determined to keep the peace in Windsor Hill Gardens, no matter what drastic measures he has to take.

Nobody can get into the gated community without Robert's consent, but nobody can get out either.