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The film begins with Mr. A (Hrithik Roshan) sky-diving and landing on a train that is carrying the British Queen. He steals her crown by disguising himself as the Queen and escapes. Newly-promoted officer Ali (Uday Chopra) and Jai Dixit (Abhishek Bachchan) are introduced to Shonali Bose (Bipasha Basu), a special officer assigned to investigate Mr. A's case, who also happens to be a fellow classmate of Jai. After the initial investigation, Dixit's analyzes the underlying trend in Mr. A's heists. As per his analysis, a theft in one of two famous Mumbai city museums will follow.