Cocktail story begins with Veronica (deepika) a wild cat who is gutsy and adventurous who meets Meera (diana). Meera is dumped by her boyfriend Kunal (randeep) and in no time both strike a chord and Meera begins to stay with Veronica. At that time comes Gautam (saif) a happy go lucky guy who has the attraction for Veronica and vice-versa. Both share a no strings attached relationship and fill it with passion. As such Meera hates Gautam and his approach in life. But the story takes a turn when both Gautam and Meera fall in love. What happens after that forms the rest of the story.