Frankie Elkin, whom readers first met in the book Before She Disappeared and who searches for missing people, learns about a young man who disappeared in a national forest. Authorities halted their search after some time, but a group of people led by the young man’s father is still not giving up. Frankie agrees to help – but soon realizes that the missing person is not the only thing wrong here. And when more people begin to disappear, Frankie understands that she is up against something very dark – and above all, that time is running out for her.