The story follows three men on an underwater treasure hunt. In the Bahamas, Aarav (Akshay Kumar) runs a successful fishing company under the title of Blue. He works with Sagar (Sanjay Dutt) who works as a diver for Aarav’s fishing company. Sagar is in a relationship with Mona (Lara Dutta) and wants to propose to her soon. Sagar is under a financial crisis, and to help him, Aarav advises Sagar to retrieve the lost treasure of a sunken ship called Lady in Blue. However, Sagar refuses to go to the ship due to an unknown reason.
Meanwhile, Sagar’s younger brother Sam (Zayed Khan) is in Bangkok. Sam is a bike rider, and meets Nikki (Katrina Kaif), a female biker who works for an underworld gangster named Gulshan (Rahul Dev). Sam is challenged by Gulshan to a bike race, and after Sam wins, he asks Nikki out for dinner. Before leaving, Gulshan asks Sam to work for him, but Sam refuses unless there’s a large sum of money involved.
During Sam’s date with Nikki, Nikki explains to Sam that the job Gulshan proposed would pay with $50,000. Gulshan hires Sam to work for him, but Sam is set up by Gulshan in failing to deliver a package costing Gulshan the $50 million. Sam must either pay his money back or die. Sam does not have the money so he explains to Nikki, whom he now loves, that he is going on holiday to the Bahamas to visit his brother Sagar and doesn’t think Gulshan will find him there. Sam arrives at Aarav’s company and Sagar welcomes him happily. In the Bahamas, Sam receives a call from Gulshan on Nikki’s phone, explaining that he has killed Nikki, and knows where Sam is.