- Himesh Reshammiya ... Himself a.k.a. HR
- Hansika Motwani ... Ria
- Mallika Sherawat ... Ruby
- Raj Babbar ... Nadia Merchant's father
- Darshan Jariwala ... Khurana
- Shravan ... Shravan
The movie begins with Himesh Reshammiya (HR) performing the song Assalam Vaalekum, on stage in Germany and his subsequent arrest. It is revealed that a reporter of Indian origin was found murdered with evidence convicting Himesh as the killer. His arrest leads to his imprisonment and subsequent flash backs reveal the incidents leading to the arrest.
The flash back begins with HR's arrival in Germany for a tour, introducing him as a rock star from India. He is accompanied by Shravan (his friend and presumably manager too).He meets his secretary as well as legal advisor and very own fan Ruby (Malika Sherawat).They also meet Ria, the event manager for the shows and love sparks between HR and her. Ria tries to confide her feelings about HR to her father but fails to convince him about HR's integrity. Her father insinuates HR of being lascivious. HR then meets him and convinces him about his feelings for Ria and convinces him for the marriage.
In the celebrations that ensue, Shravan coaxes HR to have a little champagne. HR, now drunk, returns to his home to find the reporter waiting to interview him. Despite his pleas, she insists on interviewing him. Camera footage then reveals in the course of the interview HR physically assaults her and shoots her, though the weapon remains untraced.
While in jail HR is told that Ria is to be married in two days. He is visited by the deceased reporter's father, whom he takes as hostage and flees the prison. After reaching the borders of the city, HR surrenders his fire arm to him and convinces him of his innocence. At that very moment, a sniper shoots the latter. HR, now convinced that he is being framed, begins his pursuit of the killer.
In the meanwhile Ria is to be married off and hence HR tells her father that he is free to marry off Ria wherever he wants in case HR is not able to prove his innocence in 24 hours.
HR, Shravan, Ria and Bani approach Ruby (on HR's hunch that Ruby, though horny, is innocent of the murders) for help. They browse through the invoices and other documents in Khurana's office to find that acute losses on a previously finalised world tour deal gave Khurana the motive to frame HR. HR then proceeds to confront Khurana and after a car chase, cameo by 3 auto drivers from Mumbai, etc, he finally catches up with him. In the final scene HR tricks him into revealing his motives, while a Hindi speaking tourist/native translates that comfortably for the police and HR is declared innocent. Khurana reveals that he wore a face mask in order to appear like HR and committed the murder to frame him.
