Sengodan (T. R. Ramachandran) owns 10 acres of land which prospered through his sheer hard work — it came to be called "Ponvayal" (Golden Farm). There were strong rumours that an incredible fortune in gold lay buried in the land.
Sengodan is in love with his cousin Semba (Anjali Devi). Esraj (K. A. Thangavelu), a counterfeiter, plans to get at the fortune. He seeks the help of a graduate Bangaru (R. S. Manohar) and his lover (Mynavathi). Without his knowledge, a policeman (K. Sarangkapani) and an actress "Savaal" Kannamma work against him and the smart couple succeed in spoiling the evil designs of the counterfeiter. Meanwhile, Sengodan is arrested on a charge of attempting to murder Bangaru. However, the smart detective helped by his girlfriend finds out the truth and all is well that ends well.