Journalist Cecily Wong is on her most dangerous climb yet, miles above sea level. She's come to Manaslu, the eighth-highest peak in the world, to interview famous mountaineer Charles McVeigh on the last leg of a record-breaking summit. She's given up everything for this story — her boyfriend, her life savings, the peace she's made with her climbing failures in the past — for a career-making opportunity. When first one and then another climber dies, she realizes a chilling truth: There's a killer on the mountain.