Thanga Surangam

Thanga Surangam () is a 1969 Indian Tamil-language film, directed by T. R. Ramanna and produced by E. V. Rajan. The film stars Sivaji Ganesan, Bharathi, Vennira Aadai Nirmala, and Nagesh in lead roles. The film had musical score by T. K. Ramamoorthy.
Plot.
While escaping Burma during WWII, Kamakshi (S. Varalakshmi) gives her son Rajan to a priest Arockiyasamy (Javar Seetharaman) to get him to safety. They reunite years later in India when Rajan (Sivaji Ganesan) is a C.B.I officer out to catch a gang that's making counterfeit gold. Scientist Subbaiya (T. S. Muthaiah) was attempting to manufacture actual gold but accidentally created a highly realistic counterfeit. The leader of the gang, Mr. Spy (O. A. K. Thevar) has amassed great wealth with this counterfeit and is holding Subbaiya hostage to create more. Rajan tries to learn more by interrogating Amutha (Bharathi), Subbaiya's daughter. Mr. Spy, aware of Rajan's attempts, sends several spies to get closer to him and derail his investigation. As Rajan grows closer to catching the gang, he learns shocking truths that his Father is MR.Spy Fire shots Exchanged between two And he successfully Arrest MR.SPY And He is given Gold Medal