Foucault's Pendulum

In 1970s Milan, the philosophical student Casaubon, engrossed in a thesis on the enigmatic Templar Knights, finds himself drawn into a labyrinthine conspiracy. At the bohemian Pilades Bar, he crosses paths with Jacopo Belbo, a cynical editor at Garamond Press, and their colleague Diotallevi. Their lives take an unexpected turn when they encounter Colonel Ardenti, an eccentric author convinced that the Templars have been orchestrating a grand, seven-century-long scheme of revenge. Ardenti's subsequent mysterious disappearance sparks the trio's morbid curiosity. Using their profound knowledge of history, occultism, and semiotics, they playfully construct 'The Plan' – an elaborate, fictional conspiracy theory for the Templars, weaving together historical facts, esoteric lore, and their own imaginative embellishments. However, their intellectual game spirals into a terrifying reality as they discover, too late, that the intricate fiction they invented might just be true, placing them at the heart of an ancient and deadly secret society.