Six people went in. Only one came out...

In 2016, six students and a dog on a barge trip entered Standedge Tunnel, the longest canal tunnel in England. Six students went in, and two and a half hours later, the boat reappeared on the other side with only one of the students, unconscious, and the dog.

The case of the Standedge Six was largely kept from the national media. The police investigation concluded that the only remaining student, Matthew, killed his friends, hid the bodies on the boat and returned later to move them to an undisclosed location. Matthew is in prison . . . but he maintains he is innocent.

Robert Ferringham, whose book about grieving his missing wife, Sam, propelled him into the public eye, is contacted by Matthew seeking help with his case and the intrigue of these missing people pulls him to Huddersfield to investigate. But as he studies the case from every angle - the law, the conspiracy theorists, the supernatural cultists, he begins to wonder what he's really searching for?

(p) Orion Publishing Group 2019