Sathyan is a private detective. Ushakumari who is Sathyan's neighbor, is to marry S.P Pilla on her fathers insistence. She wants Sathyan to find out more about his character. Sathyan sets on his work. His simplicity leads him to other way and in confusion he follows Nagesh instead of Pilla, where he detects that Nagesh, along with his three friend is planning to loot a bank. Sathyan informs Usha that Pilla is a man with evil thoughts. The bank is looted and unfortunately Usha's father is the manager of this bank. He and Usha approach Sathyan and thrusts him the work of getting back the loot. Does he succeed this time? Watch Thalirukal.