Moolankuzhiyil Sahadevan had an ambition to join the police force, but did not succeed because his brother-in-law Peethambaram, a sub-inspector, conspired against Sahadevan and failed him in the physical fitness test. So Sahadevan and his friendstook over and managed his uncle's private detective agency. To fulfill his father's duties, and assisted by Arjun, the police dog, Moolankuzhiyil Sahadevan became CID Moosa, a one-man plus one-dog team to find and nab the person who assassinated the Chief Minister. During his investigations, he came into contact with Pooja Bedi (Bhavana), a native of Mumbai, and this gives scope for flashy dresses, duets, and dances. How he finds the criminals forms the rest of the story. The saving grace of the film is its comedy, in which Dileep is very ably assisted by Harisree Ashokan, playing the role of a super-thief Thorappan, Kochin Haneefa as a policeman and Salim Kumar as a mad character. This is a team to watch out for!