Suppose you discover that your father is not really your father and that your actual father is the multi billionaire Pannalal Johri and that you are his only heir Well, thats exactly what happens to our hero Akhil Lokhande (Akshay Kumar), who has been working five jobs a day just to keep his fake (father) (Darshan Jariwala) who has been faking illness, in hospital. Overnight Akhil's fortunes change. He found place in girlfriend Saakshis (Tamannaah) heart, but now, Akhil suddenly finds himself welcomed in her home too by her extremely kanjoos father (Mithun Chakraborty). An overjoyed Akhil goes to Bangkok to take his rightful place as the only son and heir of Pannalal Johri. But his joy is short lived when he discovers that his father is dead. Worse is to follow. Pannalals loyal family lawyer Abdulla (Johny Lever) tells him that his father has willed his entire fortune to his dog - Entertainment. In order to inherit his fathers fortune, Akhil and his best friend Jugnu (Krushna) decide to get rid of Entertainment. Meanwhile, unknown to them, Karan (Prakash Raj) and Arjun (Sonu Sood), who are distant relatives of Pannalal Johri decide to get rid of Akhil, so they can inherit the fortune. Now its a deadly but also hilarious game as Akhil and Jugnu find ingenious ways of getting rid of Entertainment, while Karan-Arjun hatch nefarious plots to get rid of Akhil. Its truly a dog-eat-dog situation. And in the midst of all this murderous mayhem, is beautiful, loyal, intelligent Entertainment, will underdog Akhil have the last laugh. Will Karan-Arjun land in the dog house or will Entertainment prove that hes Top Dog and have the last bark.