They were childhood friends. But they had little in common except their families' connection with music. While Arjuns [Ajay Devgn] life was consumed by a passionate drive to get on stage and realize his grandfathers unfulfilled dream, Mannu [Salman Khan] was content with remaining a child at heart with no higher ambition than enjoying the good things in life. As Arjun forges a band with Zoheb [Rannvijay Singh], Wasim [Aditya Roy Kapur] and Priya [Asin], a music enthusiast from a conservative South Indian family, far away in Punjab, music becomes a survival tool for Mannu, who takes to playing in wedding bands in his village. Arjun gets Mannu to London and makes him a part of the band, but soon realizes hes created the biggest threat and obstacle to his own ambitions. Mannu, with his inherent musical gift, becomes an instant darling of the crowds. Arjuns unbearable pangs of jealousy and insecurity only worsen when Mannu also unwittingly woos and wins his secret love, Priya. As he battles his inner demons, Arjun slowly devises a sinister plan to destroy his best friend