How far will a teacher go for his students? Will he have to face consequences in the way? To know more about it, watch 'My Dear Sir'.

Samaresh and his wife Krishna return to their home in Bengal with their daughter, Tatan, during Durga puja. Upon entering their home, Samaresh learns from his elder brother, Shailesh that their mother is dead. Samaresh takes a nostalgic journey in his old home and explores his past again.