Best friends Corey and Kyra were inseparable in their tiny snow-covered town of Lost Creek, Alaska. But as Kyra starts to struggle with her bipolar disorder, Corey's family moves away. Worried about what might happen in her absence, Corey makes Kyra promise that she'll stay strong during the long, dark winter. Then, just days before Corey is to visit, Kyra dies. Corey is devastated―and confused, because Kyra said she wouldn't hurt herself. The entire Lost community speaks in hushed tones, saying Kyra's death was meant to be. And they push Corey away like she's a stranger. The further Corey investigates―and the more questions she asks―the greater her suspicion grows. Lost is keeping secrets―chilling secrets. Can she piece together the truth about Kyra's death and survive her visit?