It was supposed to be the trip of a lifetime, a final adventure before settling down. After a perfect start, Daniel and Laura’s travels end abruptly when they are thrown off a night train in the middle of nowhere. To find their way back to civilisation, they must hike along the tracks through a forest … a haunting journey that ends in unimaginable terror.

Back in London, Daniel and Laura vow never to talk about what they saw that night. But as they try to fit back into their old lives, it becomes clear that their nightmare is just beginning …