Ten-year-old Sembi and her grandmother Veerayi, an apiarist, live peacefully amidst nature in the hilly regions of Kodaikanal. They lead a beautiful life until three influential miscreants shatter all their dreams. After a tragedy the two escape and board a bus, whose Passengers from different walks of life try to help bringing justice to the duo.

It revolves around a mysterious man who justifies his crime. According to him, people commit crimes for two reasons; to hide wrongdoing or to ensure a flawless future.