In the quiet town of Natchi, tucked away in Kerala, a desperate man named George States, Jeff Doucette, faces the bleak prognosis of last‑stage brain cancer with only six months to live. He hatches a chilling plan to cheat death and gain immortality by obtaining the legendary Nagmani, the immortal blood believed to reside in a nagin, a shape‑shifting cobra capable of becoming a human. To force the nagin to reveal her mate, he and his hired henchmen capture the male snake, luring the female with the promise of freeing her companion, and they imprison the nag in a glass box where it is tortured and electrocuted. The plan works, and the nagin, driven by love and vengeance, begins to trail her captors.
The nagin finally sheds her serpentine form and emerges as a stunning woman, portrayed by [Mallika Sherawat]. Her presence jolts the town’s balance and draws the attention of Inspector Vikram Gupta, [Irrfan Khan], who becomes a reluctant ally in her quest. He is joined by his infertile wife, Maya, [Divya Dutta], whose personal longing and strain in their marriage add a tender, human dimension to the unfolding thriller. As the nagin roams, she uses her powers to protect vulnerable women—one battered by a cruel husband, another assaulted by a predatory man—becoming a mysterious avenger who can transform into a colossal cobra to strike down those who harm others. After each brutal act, she reverts to human form, leaving the police and witnesses to grapple with a string of grisly murders that seem connected to the original abduction.
Meanwhile, Inspector Gupta tumbles deeper into the case, trying to decipher the killings while choosing to believe in the nagin’s innocence and motive. His growing belief is tested as he navigates the tension between duty and a strange, almost supernatural truth surrounding the creature’s origins and purpose. The nagin’s mission becomes clear when she reaches George States’s hideout: she regains her mate, and the two consummate their reunion, leading to an unexpected pregnancy that binds love with danger. George, determined to seize the Nagmani, outfits himself with a heat‑suppressing suit to mask his presence and uses the male cobra as bait, hoping to trap the nagin during their intimate moment when she is most vulnerable.
The confrontation escalates quickly as Inspector Gupta arrives just in time to intervene. Enraged by the death of her mate, the nagin shifts into a fearsome half‑snake, half‑human hybrid and hurls George into the glass box where his captive cobra lay, delivering a brutal electrocuting end. The aftermath watches the nagin depart with her deceased mate in tow, while Gupta returns to a home that now has new meaning: Maya’s long‑awaited child is born, a quiet testament to resilience and renewal. Back at her nest, the nagin, still radiant in human form, guards the cluster of eggs she has laid, which soon hatch into a swarm of baby cobras, signaling the continuation of an ancient cycle of life, danger, and protection.
