The movie is based on the theme of Shipwreck and treasure, thus most of the shooting took place under water. All the actors have been methodically trained in scuba diving in Bangkok. Lara Dutta, who plays an underwater diver, didn't know how to swim earlier. She says "When I was offered 'Blue', I was a little sceptical but then thought it is now or never. I swim like a fish today, and am an expert in diving".

Blue which is supposed to be India’s first ‘official’ underwater film is a thriller story involving crucial scenes by the lead actors Sanjay Dutt and Akshay Kumar who plays a fisherman based in the Bahamas beneath seawater.

Lara Dutta plays the character of a glamorous beach babe and is paired opposite to Sanjay Dutt in the movie. The international technician crew consisting of Nickolette Skarlatos and Clarabelle Saldanha (who worked on Megan Fox in the Hollywood film ‘Transformers’) compared Lara’s look very similar to Megan Fox. Katrina Kaif was initially taken in to do just an item song, but the producers later on extended her role as they felt that an Akshay-Katrina starrer would again prove to be a lucky pairing at the box office.

The film is being made on a lavish scale of a 100-150 crores. The producers are leaving no stone unturned to make this movie have an ‘International’ feel, and have roped in many Hollywood top notch technicians, along with the Australian sensational singer Kylie Minogue, who will be seen in two of the most hype about songs of the movie, choreographed by Farah Khan.

250 ft deep lies the secret of Blue. Treasure hunters come in droves, lured by tales of a fabled treasure. But none but one has ever returned from the deadly depths of the Pacific Ocean; leaving behind a bloody trail and even more intriguing rumours… For not only is the treasure inaccessible; it’s guarded night and day by deadly sharks. Aarav, Sagar and Sam – three men with differing motives - find themselves diving deep into these murky depths - to hunt for the treasure. For wealthy Aarav, it’s about the intoxicating high of more money and more risk. For honest Sagar, it’s only about saving his girlfriend Mona and his brother. For dare devil Sam, it’s simply a matter of life and death – his own. As emotions run high and motives run deep, the dark side of human nature lays bared. And hundreds of feet underwater, Aarav, Sagar and Sam grapple, initially with sharks, and then with the demons of greed, betrayal and above all, their own pricking conscious…