Zahra Hidayatullah and Maliha Sami have been close friends for over seven years. Zahra belongs to a lower middle class family and Maliha comes from an upper class household, yet their class difference has never threatened their unbreakable bond. Maliha has been there for her friend through many hardships, though she never really knew the extent of the mental anguish that plagued Zahra's life. The first blow to their friendship domes when Maliha's older brother Junaid, shows his interest in marrying Zahra. Her parents have no objection to the union, but it comes as a real shock to Maliha. Somehow Maliha is not able to fathom the thought that her best friend could marry her only brother. Daam is the story of the price that she pays to her best friend to stop this marriage and how that price becomes a Daam (trap) for all of them.