Annan Thambi is the story of two brothers, Appu and Achchu. Circumstances somehow take these two brothers to two different poles, two different worlds. Appu the eldest of the twins is a vitriolic troublemaker, and erstwhile associate and present enemy of Dharmarajan (Rajan P Dev), who's niece Thenmozhi (Laxmi Rai) is madly after Appu. On the other hand, a dumb Achu is the softer one who is unlucky enough to take the brunt of others in his shoulders.

He and his wife Lekshmy is assisting his father Ravunni (Janardanan )in recreating the Puranas for their ballet troupe and is even ready to portray the roles of puranic characters in folklore, along with fellow artists played by Suraj, Salim Kumar and Harishree Ashokan.

However, the extreme repulsion never subsides between the two twins and things take a messy turn when the baddies hatch a plan and create a misunderstanding between the two which leads to Appu and Achu longing for each other's throats and see each other dead. But then like any other cinema, the confusion is cleared just before the climax and both brothers become one to take on the villains.

Cast: Mammootty, Lakshmi Rai, Gopika, Ragasiya, Harishree Ashokan, Suraj Venjaaramoodu, Kunjan, Manianpillai Raju, Siddhique, Mohan Jose, Anil Murali, Urmila Unni, Shivani
Music: Rahul Raj
Camera: Lokanathan
Director: Anwar Rasheed
Producer: Marikkar