Shivanya and her cousin Shesha are shape-shifting serpents, or Ichchhadhari Naagins, who want to avenge Shivanya's parents' death. There were five murderers, but Shivanya was able to see only three of them: Ankush, Viren and Shailesh. They killed Shivanya's parents in a failed attempt to attain a precious gem called the Naagmani.

As part of her revenge, Shivanya enters into Ankush's house as a maiden. Ankush's son Ritik, a kind-hearted and joyful young man, subsequently falls in love with her. Upon finding out about Ritik's feelings for her, Shivanya marries him for revenge. Later, she kills Viren (the first murderer) and Shailesh (the third murderer); Shivanya and Shesha also kill Ankush's friend, Suri, when Shivanya learns from Shesha that Suri is the fourth murderer.

Shivanya soon realises that Ritik is really a good person, and that he is unaware of his father's evil doings. Shivanya eventually falls in love with him, much to the disappointment of Shesha, who thinks that Shivanya won't be able to kill Ankush because of her love for his son, Ritik.

Later, it is revealed that Ankush's wife, Yamini, is the fifth murderer, and that Ritik is her fraternal nephew. Yamini and Ankush had kidnapped Ritik's real father, as only Ritik and his father could touch the Naagmani because of a sign on their bodies.Shesha begins falling for Ritik because of his loving and caring nature; however, she does not let her feelings affect her actions. Upon learning about Shesha's feelings for Ritik, Yamini, who found out that Shivanya and Shesha are shape-shifting serpents, tricks Shesha into betraying Shivanya. This causes Shesha to become Shivanya's enemy, due to Shesha's obsession for Ritik and the Naagmani. Shivanya manages to kill Ankush; however, Ritik witnesses this, finds out that Shivanya is a serpent, and begins simultaneously loving and hating her.

Ritik soon learns the truth about Yamini being evil, and joins with Shivanya to protect the Naagmani. Shivanya and Ritik consummate their marriage, leading to Shivanya losing her powers. However, she and Ritik succeed in saving the Naagmani and killing Yamini, while Shesha is jailed by the Mahishmatis. Later, Shivanya becomes pregnant.