Upon his return from a particularly dangerous but successful mission abroad, Ramu, the secret agent 115 of Intelligence Bureau witnesses striking revelations about the reselling of classified information. Ramu suspects a rich family was involved in the crime. Ramu is sent to spy on the family, which is led by Dhanapal Mudaliar and his son Nambirajan.
Ramu leaves his hotel room, thwarting the "welcoming committee" which waits for him. At another location, a mother and daughter are seen comforting each other. They were Ramu's family, including his younger sister Parvathi and their blind mother. Parvathi is worried about Ramu, but given her mother's plight, she could not share the reason for her sorrow.
Midway through the shooting of the film, Ramachandran was shot in the throat by M. R. Radha. Although he survived the attack, his voice was damaged, but he dubbed his own lines for the film.[5]
