After playing comedy and character roles, Karunas is all set to turn serious and explore other emotions. The actor will play the lead role in director Radhakrishnan's Chandamama. Swetha Basu is paired opposite Karunas in this emotional entertainer which also has Harish Kalyan (of Sindhu Samaveli fame), director R Sunderrajan, M S Bhaskar and Ilavarasu in important roles.