• Producer : Gauri Khan , Sujoy Ghosh , Gaurav Verma
• Director : Diya Annapurna Ghosh
• Editor : Sujoy Ghosh
• Writer : Sujoy Ghosh
• Dialog Writer : Sujoy Ghosh , Raj Vasant
• Screenwriter- screenplay : Sujoy Ghosh
• Story : Sujoy Ghosh
• Composer : Vishal-Shekhar , Anupam Roy , Clinton Cerejo , Bianca Gomes
• Lyricist : Vishal( Vishal Dadlani) , Siddharth Kaushal
• Actor : Abhishek Bachchan

• Actress : Chitrangada Singh

After being hit by a vehicle while being chased during the events of Kahaani, Bob Biswas (Abhishek Bachchan) has woken up from a coma after 8 years & does not remember anything even his wife Mary Biswas (Chitrangada Singh) & children Mini Biswas (Samara) Tijori) & Benny Biswas (Ronith Arora). Two officers from Kolkata Police Jishu Narang (Bhanu Uday) & Kharaj Sahu (Vishwanath Chatterjee) are keeping an eye on Bob Biswas because unknown to Bob & his family, Bob is actually an assassin., After recruiting Bob to be an exclusive assassin to work for them, they give Bob a flip phone on that photos of Bob's targets will be shared. Meanwhile, Mini is addicted to a drug called Blue that is distributed by Bubai Da (Purab Kohli) & his boss Ustaad (Kaushik Raj Chakraborty). After Jishu Narang & Kharaj Sahu send Bob's first target photo, Bob visits a homeopathy pharmacist Kali Da (Paran Bandopadhyay) to get a Nux Vormica (a pistol with silencer). Bob then successfully kills his first target Bubai and two of his men. He then leaves for home and meets Mini on his way, who bought Blue from Bubai, a fact unknown to Bob. Bob's second target is Ustaad's investor Rahul (Kunal Verma) who is an undercover police officer investigating Ustaad's illegal activities. Police officer Indira Verma (Tina Desai) starts investigating the murders of Bubai & Rahul., After inquiring about Bob, Indira suspects the former & starts keeping an eye on him. On other hand, Ustaad has his henchman Dhonu (Pabitra Rabha) investigate the murders. Dhonu is close to the Biswas family & is on friendly terms with Bob who visits his noodle stand frequently. While visiting Mary's first husband & Mini's father David's (Karanuday Jenjani) grave, Bob remembers that he has hidden a diary containing names of targets killed, who gave the target & money transactions. With that diary, he finds an unknown key. Bob's third target is Indira's boss but Bob does not kill her after meeting Indira who tells Bob that her boss is instrumental in fighting the drug mafia. Jishu Narang & Kharaj Sahu pay a visit to Bob & enquire why he did not kill his third target, to that Bob tells he will not continue on the path & if they force him, he will go to Indira Verma with the diary. Jishu Narang & Kharaj Sahu go to Boss (Rajatabha Dutta) who is a deputy of Indira's boss. Bob visits Kali Da to return Nux Vormica & enquire about the key to this Kali then takes Bob to the trunk room deeper inside his shop & points out Bob his trunk. Inside Bob finds a carrier bag full of cash & becomes happy that now Bob & his family can leave happily in Kalimpong., Bob pays his dues to Kali Da & returns home. It is revealed that Boss, Jishu & Kharaj are associated with Ustaad. Boss provides Ustaad with a polaroid picture of Bob who has been killing associates of Ustaad. Ustaad contracts Bob's kill to Dhonu but Dhonu immediately rejects & is instantly killed by one of the Ustaad's henchmen. Two of Ustaad's henchmen visit Bob in his home at night & torture him, breaking his right hand & killing Mary & Benny in the fighting process. Bob manages to kill both men. Bob is then arrested by Indira but is released as ordered by Indira's boss. Bob visits Jishu & Kharaj & kills Kharaj when enquiring about Ustaad. Jishu takes Bob to Ustaad where Bob kills several of Ustaad's henchmen. Ustaad also known as Doctor Uncle then presents Mini who is now addicted to Blue. Ustaad tells her to kill Bob in exchange for a stash of Blue so she can pass in exams and become a doctor. In the process, Ustaad agrees to have ordered the murder of Mary & Benny & after a struggling fight Bob finally kills Ustaad. Six months later, Bob & Mini visit Mary & Benny's graves & do not talk much as Mini is still angry and unforgiving towards Bob for what happened. After Mini leaves, Bob receives a photo of his target Vidya Bagchi (Vidya Balan) from Kahaani on his phone which he happily accepts.

• Track 1 : Tu Toh Gaya Re ( तू तो गेला रे )
• Track 2 : Mujhe Mujhse Kaun Bachayega ( मुझे मुझे कौन बचाएगा )
• Track 3 : Jaanoon Na ( जानून ना )
• Track 4 : Teeja ( तीजा )