Aagathan literally means the one who comes. This Kamal movie can be categorized as an entertaining film with lots of interesting moments. A fully thriller movie with good humour as well as suspense. At some point one feels it to be an imaginative one but still its nice to watch.
Gautham (Dileep) is the CEO of an company. He happens to meet Shreya (Charmy Kaur), a management student during a bus journey. As usual she hates him first and apparently falls in love with him. Shreya wish to meet Gautham to her parents and takes him to her home. Her father Hareendra Varma (Sathyaraj) is a Retd General. Her mother Malathi Thampuratti (Zarina Wahab) is a house wife. Both of them likes Gautham and agrees to the marriage proposal by Gautham.
But soon the happiness in the family is completely destroyed. Hareendra Varma comes to know that Gautham did all this purposely to seek revenge. Why did he do so???What grudge he has to the Hareendran family? All these combine to form the climax of the film.