Mani, stemming from a modest background, enters in the service of the billionaire Maruthachalam, as the driver. The charming daughter of this fantastically wealthy notable, Susila desperately falls in love with Mani and it is mutual. However, Mani seems to be very worried. He does not confine himself only to his driver's job. Indeed, upset by the terrible secret (that her mother reveals him at the bedside of her agony) on his young brother Chandra and intrigued by the strange behaviour and the actions of his boss, Maruthachalam, Manikkam looks actively for the answers! In spite of the categorical opposition of his father and contrary to all expectations, Susheela marries the man of her life, Manikkam. But does she believe and do they think all to know or to seize Manikkam, really? But who is thus, in reality, this Mani? What does he plot?
Before Kaavalkaaran began production, Ramachandran's voice had been damaged due to a gunshot to his throat caused by M. R. Radha. Despite this, Ramachandran refused others' suggestion to use a dubbing artiste, and dubbed in his own voice.[2] The song "Ninaithen Vanthai" has him and Jayalalithaa dressed as Mark Antony and Cleopatra respectively, re-enacting the William Shakespeare play Antony and Cleopatra, and later Layla and Majnun.[3][4]
Kaavalkaran was released on 7 September 1967.[7]The Indian Express wrote that Veerappan and Neelakantan "made the story gripping with well-punctuated romantic, dramatic and fighting scenes."[8]Kalki called the film a flawless, entertaining film.[9] The film became a major success, and Ramachandran considered it his ninth turning point.[10] It won the Tamil Nadu State Film Award for Best Film.[11]
