If you were one half evil, wouldn't you want to know about the other half? In the scorching summer of 1976, Robyn spends her days swimming at the Lido and tagging after her brother. It's the perfect holiday – except for the crying women her mum keeps bringing home. As the heatwave boils on, tensions in the town begin to simmer. Everyone is gossiping about her mum, a strange man is following her around, and worst of all, no one will tell Robyn the truth. But this town isn't good at keeping secrets… Twelve years later, Robyn returns home to a house that has stood empty for years and a town that hasn't moved on, forced to confront the mystery that haunted her that summer. And atone for the part she played in it.