"Mouna Guru" stars Arjun, a well-known Tamil actor, in the lead role as a professor who becomes embroiled in a mysterious and thrilling sequence of events. The movie follows his character's journey as he navigates a complex web of relationships, secrets, and lies. Upon its release, "Mouna Guru" received generally positive reviews from critics, with many praising Arjun's performance and the film's engaging storyline.