The film opens in medias res where street fighting issues are raised in Mumbai. Sports chairman Peter Braganza (Kiran Kumar) expresses his desire of making street fighting a legal sport and decides to open a league called Right 2 Fight (R2F). Meanwhile, in prison, Garson “Gary” Fernandes (Jackie Shroff), a recovering alcoholic and former MMA expert under rehabilitation, is released from his jail term and his younger son Monty (Sidharth Malhotra) comes to pick him up. Monty gets tensed when his father asks about his elder son David and takes him away to their home. At home Gary acts protective of all the belongings of his wife Maria, who died many years ago. David (Akshay Kumar), now a physics teacher, has a daughter suffering from a kidney disease. Unable to arrange money from the bank and other sources he arranges money through street fights. This pressurizes his wife Jenny (Jacqueline Fernandez) as she is worried about David. Meanwhile, Gary, who misses his wife Maria (Shefali Shah), starts hallucinating about her. Gary then tries to meet David but the latter ends up throwing Monty and Gary out of his house in rage.
Monty is then revealed to be Gary’s illegitimate child. Maria nevertheless loved Monty, as she did to David. The two brothers had a close, loving relationship until David was 18 and Monty was 15. The night on Monty’s 15th birthday, Gary came home drunk and apologizes to Maria for destroying the family, but mentions his lover Sarah’s name, instead of Maria’s. An enraged Maria confronts Gary about this. In a drunken state Gary hits Maria who gets injured and dies. A furious David pushes Gary aside. When Monty comes close to Maria, David angrily pushed him away, holding his father and brother equally responsible for his mother’s death. This creates a rift between Gary, Monty and David.