J.J. Abrams 'science fiction film and his Bad Robot production company's first R-rated film "Operation Overlord" released a poster showing paratroopers landing with blood. The film is jokingly called "Call of Duty's Zombie Mode" by many fans. It tells the story of the Normandy landing during World War II when encountering biochemical zombies: On the eve of Operation Overlord in Normandy, American paratroopers went deep into the enemy's rear to perform a mission that was crucial to the success of the invasion. Important mission. But as they approached their target, they began to realize that what was happening in the Nazi-occupied village was much more complex than simple military operations, and that they would be fighting the supernatural forces that were part of the Nazi experiment.