The Sigma Protocol

American investment banker Ben Hartman travels to Zurich for a ski holiday, unaware that his return to Switzerland will thrust him into a dangerous and complex conspiracy connected to a mysterious old CIA file marked "SIGMA." Meanwhile, DOJ agent Anna Navarro is caught in a global hunt for a relentless killer, uncovering unsettling secrets tied to her investigations. When their paths cross, Ben and Anna must work together to unravel secrets that could threaten the world's future, all while navigating threats that push them to their limits.