"Malluvillain" is a crime thriller that revolves around the life of a small-time thief, Abdulla (played by Arjun Ashraf), who operates in the city of Kochi. The story takes a turn when Abdulla is forced to steal a valuable necklace from a jewelry store, which leads to a series of events that put his life in danger. As the narrative unfolds, the movie explores themes of survival, loyalty, and redemption.