A mysterious man with a tragic past(Irrfan as Nirmal Kumar) kidnaps the son(Vishesh Bansal as Rohan) of Home Minister Prashant Godwami(Tushar Dalvi) from Dehradun. The minster immediately appoints CBI officer Nachiket(Jimmy Sheirgill) to investigate the case. The kidnapper doesn’t demand for any money but tells the minister that he should find his missing son(Apu) first, if he wants Rohan back. He also hints that he lost his son in a conspiracy stemming from corruption. Nachiket suspects that Apu may be a victim of a man-made disaster like a bridge collapse that had occurred in Mumbai. Meanwhile, a lodge receptionist identifies Rohan, after CBI releases his pictures in papers and on digital media. He informs the cops about Nirmal and his looks. An old man in Mumbai also reveals Nirmal’s identity and his residential address. It is discovered that Nirmal’s seven year old son Apu got killed while he was passing under the Mumbai flyover which collapsed, killing many others. Nirmal’s wife leaves him and shifts to the US, thus making him solely responsible for Apu. He is a doting father, who diligently looks after his understanding son. He regrets not dropping his son off to school personally, on the fateful day that he got killed under the bridge, on his way to school. Nirmal happens to be a technician and chooses to go attend a client over dropping Apu to school to make some extra money. In the process, ends up losing him forever. He now seeks answers from those who were involved in the dubious activities that led to the bridge collapse. He calls for a meeting at his home, forcing the ministers to show up as he warns that he may kill Rohan, if they don’t. He also asks a TV channel to cover their interaction live. The home minister, his colleague, civil engineer and bridge contractor admit their wrong doings and corruption allegations. They confess that they extorted money for themselves and their political parties by using substandard material. All of it is televised. On getting the answers he seeks, Nirmal lets Rohan and the rest leave his house safely. Nachiket arrests Nirmal and let him let go of his son’s belongings in the sea, before taking him to jail. Nirmal gets the closure he seeks.