Bala's explorations into the dark side of human nature have worked better when they have had a strong context and were an inherent part of the plot. Pithamagan's Sithan was brought up in a graveyard and he acted as drug mule, so the tragic fates that people close to him meet was unavoidable. Similarly, the visually-challenged Hamsavalli of Naan Kadaval, who is forced into begging, seeks for her dever mais...