Plot
Tony Manero, a former disco king, is living in a Manhattan flophouse, working as a dance instructor and waiter at a dance club, searching for a big break in the modern dance productions on Broadway. The break from his Brooklyn life seems to have somewhat matured Tony and refined his personality, including his diminished Brooklyn accent, an avoidance of alcohol, and less use of profanity. Other attitudes remain unchanged, such as his disregard for his girlfriend, the forgiving Jackie, who is a dancer and rock singer. Tony maintains some of his other macho double standards, such as seeing other women but being offended if he sees Jackie with other men.
Tony watches a show that features Jackie as a dancer in the chorus but focuses on the lead, English dancer Laura. He pursues her with seduction in mind and spends the night with her. He is annoyed when she dismisses him afterward, not understanding that she intended their encounter to be a one-night stand. Laura coldly justifies her treatment by saying that "Everybody uses everybody" and implies that Tony used her in order to get a dance role in her upcoming show. Unable to trust Tony, Jackie breaks up with him. Jackie, Tony and Laura then all audition for the Broadway production, Satan's Alley. Jackie and Tony land small roles, and Laura is cast as the lead female dancer.
Tony begins to realize how callous he has been to Jackie and walks from Manhattan to his old Bay Ridge neighborhood in Brooklyn in the middle of the night, which includes walking past 2001 Odyssey, his former hangout. When he visits his mother Flo and apologizes for the troublemaking ways of his youth, she points out that his selfish behavior as a teen helped him escape a dead-end life in Bay Ridge. Tony feels better and heads back to Manhattan to repair his relationship with Jackie. His hostility to and distance from the arrogant Laura increase as the production progresses.
Tony decides to take a shot at replacing Butler, the male lead of Satan's Alley, and requests Jackie to help him practice the number. Laura is disgusted when Tony succeeds and openly displays her resentment at having to partner him in the show. They cannot hide their chemistry on stage, though, which pleases the show's director Jesse.
Satan's Alley sells out, and the cast takes the stage to a standing-room-only crowd. The first act is a success despite Tony's disregard for the script when he kisses Laura at the end of their number. Jesse blasts Tony backstage, telling him to take his personal war away from the production. Laura seems to offer a truce when she asks to see him after the show to "clear things up". Aware of her manipulative ways, Tony coldly tells her that he has other commitments, and Laura snidely responds that he lacks star quality.
The second act is a dazzling display of dance and special effects, and Tony abandons the script near the end of the show. He hurls Laura away and gives way to his frustration in a solo dance. He then holds out his hand to Laura with a command to jump, and she leaps in his arms for a climactic finish to the show. Tony celebrates with his jubilant castmates and reconciles with Jackie. He leaves the theater and struts through Times Square.
