Welcome to Serenity Falls ? the most idyllic, and safest, town in the US. For Dan and his daughter Sadie, it?s the perfect relocation option. A fresh start, thousands of miles from their troubled past in the UK. But their idyll is shattered when they find a dead body in the swimming pool of their new house. It?s just the start of a series of disturbing discoveries. Abandoned houses where people have seemingly just upped and left. The strange woman putting up ?missing? posters for a child who drowned almost thirty years ago. An ice-cream van that drives around at night making sure residents are asleep? As plans gear up to celebrate Serenity Falls? fiftieth anniversary, something is stirring beneath the surface of the blissful fa?ade. Is someone so desperate to keep the town?s secrets that they?d resort to anything to preserve them?