Mutthananna is village simpleton and a good musician and poor orphan who was leading his life with phisicaly challenged sister bhavani. Kiran Kumar a.k.a Dimond Kiran,Mutthu's lookalike,he was a billionaire and wanted who was wanted thief and dimond smuggler, when mutthu arrives to city, suddenly he meets Kiran Kumar and he was happy and shock to see him.Kiran convence to Mutthu that he should stay with him like his brother.After a days Kiran tells Mutthu that he has a cancer and you should help my every business by taking his place, Mutthu accept's his all order without knowing that he is a wanted thief.When Mutthu comes to know that he a thief Kiran hits him and blackmail him to take his place otherwise he will torchere Mutthu's sister.Will Mutthu comes out of Kiran's deadly trap? How he will save his sister?