You thought they were just staying for the weekend. They looked harmless enough - with only two suitcases and a cat in a wicker box. But soon things turn very, very dark. It happens slowly, yet so extraordinarily quickly. Now you and your sister must find a way to survive....

A captivating story of a crumbling estate in the wilds of Scotland, its century-old secret and an enduring mystery.... Following the death of her last living relative, Hetty Deveraux leaves London and her strained relationship behind for Muirlan, her ancestral home in Scotland - now in ruins. As Hetty dives headfirst into the repairs, she discovers a shocking secret protected by the house for a hundred years.

Lydia is the favourite child of Marilyn and James Lee - a girl who inherited her mother's bright-blue eyes and her father's jet-black hair. When Lydia's body is found in the local lake, James is consumed by guilt, and Marilyn, devastated and vengeful, is determined to hold someone accountable. But it's the youngest in the family - Hannah - who may be the only one who knows what really happened.

During the languid days of the Christmas break, a group of 30-something friends from Oxford meets to welcome in the New Year together, a tradition they began as students 10 years ago. For this vacation, they’ve chosen an idyllic and isolated estate in the Scottish Highlands - the perfect place to get away and unwind by themselves. They arrive on December 30, just before a historic blizzard seals the lodge off from the outside world. Two days later, on New Year’s Day, one of them is dead.

Saffyre Maddox was 10 when something terrible happened; she's carried the pain of it around with her ever since. The man who she thought was going to heal her didn't, and now she hides from him, invisible in the shadows, learning his secrets; secrets she could use to blow his safe, cosy world apart. Owen Pick is invisible, too. He's 33 years old and he's never had a girlfriend, he's never even had a friend. Nobody sees him. Nobody cares about him. But when Saffyre Maddox disappears from opposite his house on Valentine's night, suddenly the whole world is looking at him. Accusing him.