Lily refuses to believe what everyone else accepts to be true: that her father has died while climbing Denali, the highest mountain in North America. Lily has grown up hiking in the Alaskan wilderness with her dad. He's an expert climber. There's no way he would let something like this happen. So instead of grieving, Lily decides to rescue him. Her plan takes her to Denali and on a journey that tests her physically and emotionally.