Six students from an elite private school are returning home after a camping trip on the private plane belonging to Cassie's father's business. The regular pilot is ill, so there is a substitute, and not long into the journey, the teens realize the plane is heading west instead of east. They have a security person, Reeva, with them, and she is not overly concerned. At the same time, we see Michelle Okolo at work as an intern at the National Air Traffic Investigation Center. She took the job because her father was killed when a storm popped up and his plane wasn't alerted, so the job is personal to her. Things start to go badly very quickly on the plane-- Cassie suffers a bad allergic reaction, and it's soon clear that she has been poisoned. Was it the replacement pilot? Reeva? One of her friends? When the plane goes offline, NATIC is brought in, and Michelle starts investigating the social media feeds and background of the people on board, trying to figure out who is responsible. Things go from bad to worse, there are more deaths on board, and it looks like no one will survive. Will Michelle be able to make a difference this time?