The film starts with a plane accident in which a small child narrowly escapes. He is then looked after by his maternal uncle (Vijayaraghavan), and all the family's wealth will be inherited to him. As per their astrologer, in the future he should marriage a girl whose star is Chothi Nakshatra, only then will he prosper in life. The boy grows up to be a young man Balakrishnan (Biju Menon), who is unsuccessful in anything he does.
He falls in love with Maya (Lakshmi Rai), the daughter of a wealthy businessman named Patella, who is settled in Mumbai. When Patella gets to know about their relation, he objects and Maya elopes with Balakrishnan and gets married. In the meantime Lakshminarayanan alias Lakshmi (Baburaj), a friend of Balakrishnan tries to convince Balakrishnan's uncle about the marriage and the uncle agrees to visit the couple. But then, on the second day of the marriage Maya leaves him and returns to Mumbai.
Balakrishnan did not want his uncle to know that his wife left him, so he hires a girl Mayamohini (Dileep) to act as his wife. The story continues with many twists and later it is revealed that Mayamohini is actually a man named Mohanakrishnan, who the Kerala Police had been searching for so long. He had been put into a trap by Patella and his men. Balakrishnan agrees to help him in his quest. They travel to Mumbai and there they meet Maya who was working as a club dancer and she agrees to help them. She tells all truth about Pattela, in the flashback it turns out that Mohanakrishnan's father (Nedumudi Venu) was killed by Pattela and his manager Sanjay (Kazan Khan) to get hold of their property. Pattela is opening a new business in town and on the inauguration day has arranged some dance as well. Mohan gets dressed up as Mayamohini again. Pattela invites her to his room and tries to have sex with her. In the meantime, the cops also arrive there to arrest Mohan. Pattela dies in the shootout that follows and later Mohan is released of his charges.
Later, Lakshmi's family comes for an alliance with Mayamohini, not knowing the truth. His sister was also with him and her star is revealed to be Chothi much to the delight of Balakrishnan.