In the tense and intimate thriller Guillaume Canet's "Lui," a seemingly ordinary man finds his life unraveling with a single, violent act of self-defense. Guillaume Canet stars as a husband and father whose split-second decision to protect his family from a home intruder leaves him a local hero, but also a man haunted by the consequences. As the media glare intensifies, his wife, played by Virginie Efira, and a determined police officer, portrayed by Mathieu Kassovitz, begin to see unsettling cracks in his story. This gripping drama explores the fragile nature of identity and the dark secrets that can lurk beneath a perfect facade, building an atmosphere of paranoia where public perception and private truth violently collide.