A year ago, Gemma met the love of her life, Danny. Since then, their relationship has been perfect. But one evening, Danny doesn't return home. Gemma turns to the police and she is horrified by what she discovers - a serial killer is on the loose in Bristol. But the police are suspicious. Why has no one apart from Gemma heard from Danny in weeks? Why is there barely a trace of him in their flat? Is she telling them the truth, or is this marriage hiding some very dark secrets?