Laden with laughs, this sleuth spoof starts with Khaled Muhammad aka Baba (Sharath Saxena) in jail telling one of his henchmen to kill the kerala chief minister Ravi Menon(Murali).Sahadevan (Dileep) is the son of a police constable (Oduvil Unnikrishnan) who works in the dog squad.
Sahadevan has only one ambition and that is to join the police department and for that he has cleared the exams and is waiting for the physical test. But he has an enemy, his own brother-in-law Peethambaran (Jagathy Sreekumar) who does not like him.US spaceSome of Baba's henchmen, with the help of commissioner Gauri (Ashish Vidyarthi) plan to kill the CM by placing a bomb in his room in the hospital when Ravi Menon was unwell.However Sahadevan foils the plan as his dog Arjun sacrifices himself. The blame is put on him by the police commissioner but he is saved by the DGP (Vijayraghavan).
Since the commissioner is aware of Sahadevan's knowledge about the the bombing conspiracy, he along with Peethambaran deliberately fail him in the physical test. When he finds out who the crooks are, he tries to find a way to foil it and that hopes to become a private detective via his uncle Karamchand(Captain Raju).
He becomes a private detective and calls himself CID Moosa. He has a funky car that different tricks to assist him in evading his enemies. During all of this he falls in love with a girl named Meena (Bhavana).After innumerable attempts, he makes her fall in love with him. Meanwhile, he sexy insane intercepting the first terrorists who planned to place the bomb in the hospital. Gauri in anger destroys Moosa's office saying it doesn't have license. When Moosa goes to the CM for a petition, the CM's car explodes. Moosa is applauded for saving him.Then he kills the second terrorist and gets a Rs.5 lakhs as a reward.
Meena then provides vital information to Moosa that those terrorists were tenants in her house and filed a case to the commissioner not realising that she would be arrested as soon as she reached her flat. The commissioner tries to molest Meena but Moosa intervenes to save her.Later Gauri forces the CM to issue a warrant against Moosa which he reluctantly accepts.On the way home,Ravi Menon sees Baba on the road(he gets released from jail).Moosa meets the CM to prove his innocence but Baba enters to assault the CM and shoots him in his arm.
Moosa takes the CM to safety in his cars and uses the different tricks and devices in his car to evade the police.Then he gets intercepted by Gauri and Baba but kills them using his wits and a little help from his dog.The CM is saved and now Moosa is sent to Scotland to solve bigger cases.