Maargam is the story of Arjun (Vinay Rai), an IT professional who shifts from London to Chennai to start his own venture. Arjun one day comes to know that his late father had another wife and a daughter who wish to sell their family house in Madurai. Arjun reaches Madurai along with his half-sister only to find a tenant by the name of Durai Raj living in their house with his daughter Annapoorni (Bhavana Menon). In order to take over the claim of the house Arjun tries to woo Annapoorni and win her over, so that he could sell property. During his stay in Madurai Arjun accidentally gets entangled with a local goon Guna whose wife accidental dies for which Arjun is blamed. Guna looks to avenge his wife’s death as he follows Arjun to Chennai. The remaining story depicts how Arjun gets out of this mess and wins Annpoorni back.