Set in 1960s Bombay, the film tells the story of Balraj (Ranbir Kapoor), a street fighter/boxer who is in love with the jazz singer Rosie. Seeing Rosie (Anushka Sharma) with wealthy men further sparks his dream of becoming a "big-shot", believing that if he manages to become rich, he might win Rosie's heart. Balraj and his friend Chimman (Satyadeep Misra) then catch the eye of Kaizad Khambatta (Karan Johar), a wealthy businessman who is impressed by Balraj and offers him to manage his club "Bombay Velvet", which Khambatta uses to further his illegal tasks and activities. He also nicknames Balraj "Johnny", which then becomes his identification. As well as this, Johnny and Chimman fulfill minor tasks for Khambatta, including capturing a dirty photograph of a minister who Khambatta wants to blackmail. This news reaches Jimmy Mistri, a media reporter, who also happens to be the same wealthy man Johnny had previously seen with Rosie.
Vetriselvan (Sathyaraj) is an established and an old fashioned music director in the industry. He is loved and respected for his works and is termed as the greatest musician of our times. A. K. Shiva (S. J. Surya) who works as an assistant under Vetriselvan gets an opportunity to compose music for a small time film. When he seeks permission from Vetriselvan to go ahead with his first venture as a music director, Vetriselvan doesn't oppose the idea as he wouldn't have imagined even in his wildest dream that one day A. K. Shiva would surpass him in the musical world.
Arun (Mohan), a prominent singer is in jail with a death sentence looming over his head. He meets Shanthi (Revathi) during one of his concerts, and is followed by her on many occasions into the jail and outside too. He shows nothing but animosity towards her behavior, and keeps pushing her out of sight. But Shanthi is persistent and does not give up either. An inmate named Maari attempts to escape from jail, but he is stopped by Arun. Maari later tells Arun about his sick daughter (Shekhina Shawn), and his inability to pay for her operation. Arun sympathises with him, and promises to raise funds for the sick child through his next concert, which he also plans shall be his final one.
Hiroki, lycéen solitaire et amoureux, poursuit une fille, mais une autre apparaît mystérieusement dans sa vie. Est-elle le produit de son psychisme ou est-elle réelle ?
Camping on the streets of Tokyo, Michio meets Chihiro, a dancer, whom he makes fun of at first, but later befriends. Together they join a team of aspiring dancers and aim to make their professional debut. Michio and Chihiro gradually develop feelings for each other but, triggered by jealousy, Michio's old friends try to come in between them.
Kyoko a rencontré Tetsu lors de son voyage à San Francisco. Bientôt, ils tombèrent amoureux, mais se marier n'était pas dans son esprit. Ils devaient se revoir à Tokyo mais Tetsu ne s'est pas présenté. Elle est allée le chercher à San Francisco mais tout ce qu'elle a trouvé, c'est lui avec sa nouvelle petite amie. Kyoko est retournée à Tokyo et a finalement épousé le PDG d'une grande entreprise.
Troubled by the growing worldwide trend of pop singers being elected as politicians, the President of South Korea orders his Chief Secretary to invoke "Emergency Act 19". This new law criminalizes all pop singers, and the army is deployed on the streets of Seoul to round them up. One pop star, Hong Kyung-min, is arrested while performing a concert, but his angry fans mob the soldiers as they try to take him away. The Chief Secretary's teenage daughter, Min-ji, is amongst the fans, and leading her idol to safety gives him her phone number. Kyung-min finally makes a getaway with his friend and fellow pop star, Kim Jang-hoon.
Waikiki Brothers is a band going nowhere. After another depressing gig, the saxophonist quits, leaving the three remaining members - lead singer and guitarist Sung-woo (Lee Eol), keyboardist Jung-seok (Park Won-sang), and drummer Kang-soo (Hwang Jung-min), to continue on the road. The band ends up at Sung-woo's hometown, Suanbo, which was a popular hot spring resort in the '80s. The main resort now is the Waikiki Hotel, and their gig at the hotel nightclub starts well, until Jung-seok and Kang-soo start to play out their worst vices. For Sung-woo, the calm center of the band, the return home is filled with reservations of disappointments and a lost love. He reunites with his old high school friends, the original Waikiki Brothers, and finds them far from happy. He runs into In-hee (Oh Ji-hye), his unrequited first love. Now widowed, she seems desperate to try their relationship again. Sung-woo also runs into his old music teacher, Byung-joo, and tries to help him get work. But the band is fired from the nightclub and Sung-woo is forced to perform in karaoke bars. And, then, tragedy strikes when his high school classmate Soo-chul dies in an accident.