The Sigma Protocol

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In this gripping tale of intrigue and deception, American investment banker Ben Hartman returns to Zurich for a ski holiday, his first visit since his twin brother's tragic death there four years earlier. However, his arrival leads to a shocking encounter with an old college friend, Jimmy Cavanaugh, who attempts to kill him, resulting in chaos and multiple deaths. Barely escaping, Ben finds himself thrust into a terrifying nightmare and on the run. Meanwhile, Department of Justice agent Anna Navarro is being hunted by a relentless killer while investigating a series of mysterious deaths of elderly men worldwide. These deaths are linked by a decades-old CIA file marked with the code word SIGMA. As Anna navigates life-threatening attacks, she realizes that time is running out and the survivors are dwindling. When Ben and Anna's paths cross, they discover that their only chance for survival lies in each other. Together, they race to uncover the sinister secrets behind Sigma, which threaten their understanding of themselves, their loved ones, and history itself. As they delve deeper, they confront a vast deception that could alter the fate of the world, placing their lives—and the future—in jeopardy.