Only She Came BackOn July 28 at 6: 30 p. m., Kiri Dunsmore walks out of the desert wearing her boyfriend's sweatshirt, covered in his blood. Dazed and on the verge of unconsciousness, she tells a cashier that he's still out there and most likely dead. The disappearance of Callum Massey, a "survival guru" with hundreds of thousands of YouTube followers, rocks the nation. And Kiri is a prime suspect. Back in Kiri's hometown, true crime fanatic Sam is completely hooked on