En Kadamai is a Tamil language film starring M. G. Ramachandran (MGR). The film was released in 1964. This thriller-action movie was produced and directed by M. Natesan. MGR had already collaborated with the boss of the Natesh Art Pictures, in 1960, in the famous swashbuckler film Mannadhi Mannan. The film is about Dharmalingam (M.R. Radha), a rich landlord, is the father of two sons and a daughter. His eldest son has a love marriage with a poor teacher's daughter, Kamala. Dharmalingam disowns them. The son dies and Kamala is left homeless, with a little child. Nathan (MGR), a police officer, gives Kamala shelter in his house and decides to help her fight her case for property. But Kamala is murdered on the way to the court hearing. Fingers point at Dharmalingam and his son Shankar (M.N. Nambhiyar). Shankar and Nathan's sister Uma are in love. Nathan comes to investigate the case and falls in love with Dharmalingam's daughter Sarasu (B. Saroja Devi). Now, Nathan is in a dilemma. Should he protect Shankar as he is his sister's sweetheart, or should he drop the case because he loves Dharmalingam's daughter? Or is the real murderer someone else?