Plot-wise, "Teesta" could be a drama or socio-political film. Bengali cinema often explores deep social issues. Perhaps "Teesta" deals with the lives of people affected by environmental or political issues, given the name Teesta is a river in India. The river Teesta is a significant one in the region, and maybe the film's plot revolves around the communities living near it. Environmental degradation, political conflicts, or the lives of fishermen might be themes.