The story starts with Gautham (Suriya) and Kundavi (Jyotika) getting married in a very Tamil ceremony in a little village in Tamilnadu they are happy and they look wonderful.
6 years of bliss, a sweet little daughter Aishwarya (Baby Shreya) and an idyllic marriage in Mumbai - Gautham and Kundavi's life is happy, content and as close to perfect as it can get. Both are working parents and their life is beautifully balanced between work and time at home and outside with their daughter and each other.
One day, while searching for something of Aishwarya's for her school, Jyotika stumbles upon a diary belonging to Gautham. It seems unused for many years and she gives in to her curiosity and reads through it, little knowing that her life was about to change totally...