Cassidy Blake almost died once, and now she can see ghosts. When her parents get a TV gig hosting a show about haunted places, Cassidy travels to Edinburgh, Scotland—one of the most haunted cities in the world. There, she meets another ghost-hunting girl named Lara, who warns her that the city's spirits are more dangerous than they seem. With her ghost best friend Jacob by her side, Cassidy must navigate a thin veil between the living and the dead to uncover the city's spectral secrets and protect herself from a powerful, ancient threat.