"My Son" is a 2021 thriller film directed by Christian Carion. The story follows a father, played by James McAvoy, who embarks on a frantic search for his missing son after he is kidnapped. The film is notable for its intense emotional depth and suspenseful narrative. The unique aspect of "My Son" is that James McAvoy performed without a script, relying on improvisation to convey his character's desperation. This approach adds a layer of authenticity to the film, making the audience feel the father's anguish and urgency throughout the gripping storyline.