While pregnant Lastri flees from home because her parents forces her into a marriage. Agus, her groom-to-be, is ready to accept Lastri for what she is. He wants her as his second wife. Lastri hides inside the Cave Blorong before Agus and his friends find her.
Lastri refuses to return home and chooses instead to jump off from a cliff. In the sea a giant snake emerges and gets the fetus out of Lastri’s womb. The giant snake is the ruler of the Cave Blorong. He raises Lastri’s daughter. Her name is Larasati.
Larasati leaves the cave when she’s a grown up. Her beauty allures young men. But it is those young men who become the victim of Larasati. She has become the incarnation of the snake goddess. When she kills one of her admirers, Aryo sees it. Larasati’s face, looking like Lastri’s, draws Aryo to approach the girl. He tells her the mystery of her mother’s death. Agus and his friends become her target.
Tasya, a journalist, gets interested in a series of mysterious murders. Her curiosity leads her to meet Larasati. Tasya helps her find the mysterious man who impregnates Lastri. The man’s name is unknown as Lastri commits suicide keeping it to herself.