No WiFi, no distractions. No way out…

Agatha needs to get some serious work done on her new book. To help her, her husband bought her quiet time to concentrate: a train ticket for a six-hour ride from Toronto to Montreal. The time aboard sets the stage for a perfect writing retreat, with only a handful of other passengers, plenty of snacks and drinks, and beautiful views.

But Agatha has other plans for her day out… plans that are unexpectedly derailed when the train breaks down in the middle of the frigid Canadian woods, and one of Agatha's fellow passengers dies quietly in his seat. Soon, a pleasant morning in transit turns into a fight for survival against an unknown and unseen enemy. Will Agatha, or any of the passengers, make it out alive?