Thiruvilayadal Aarambam is a comedy-drama film that revolves around the life of a young man named Arjun, who dreams of becoming a film director. The story takes a turn when Arjun's father, a renowned director, assigns him a task to make a film within 30 days. As Arjun navigates the challenges of filmmaking, he encounters a series of humorous events that lead to unexpected outcomes.