As station leader at the Davis Research Station in Antarctica, David Knoff was leading 24 expeditioners in a standard mission when the Covid-19 pandemic hit, international travel came to a standstill and their ride home was cancelled - indefinitely. What was supposed to be a routine mission became a high-pressure cauldron of uncertainty and anxiety where everyone was pushed to their mental limits. They'd have to draw on every ounce of resilience to ensure a safe return. Facing unprecedented challenges, including a complex medical evacuation and a fire on board the ship meant to get them out, David would need all his experience as an infantry platoon commander and diplomat to keep the team safe and get them home, albeit to a world that was changed forever. 537 Days of Winter is a high-octane, sub-zero story unlike any other in modern Antarctic history.