Apthamitra movie is based on Nagavalli(Dancer).Ramesh (Ramesh), an engineer buys the palace.Everyone believes that the spirit of Nagavalli, a dancer is captivated in a room of that palace. Ganga (Soundarya) she opens  the locked room with the help of Soumya (Prema).Then start the troubles.Vijay (Vishnuvardhan) who came to ramesh house for holidays. Finally All of them come to know about the nagavalli and all the problems are solved.