Siva (S. J. Surya) is an investigative scribe who shares a live-in relationship with rich and bratty Madhu (Nila). They have hot-headed run-ins and even hotter patch-ups. Things come to a head when Madhu starts a restaurant with a brother of her friend. Nosy and envious Siva cannot take it, and this causes a split between the duo. Fun starts as the fantasy element appears in the form of their apparitional alter egos. Eventually they come together, but there is plenty of over-the-top entertainment aimed at a post-teen youth audience. Anbe Aaruyire features the memories of each other in a human lookalike appearances. These memories remind them of their good times and the inner love for each other, which help in their reunion.