The musical film "Grease" came out in 1978 and it was based on a stage production of the same name. The story goes as follows: "Sandra 'Sandy' Dee Olson" (Olivia Newton-John) falls in love with "Danny Zuko" (John Travolta) during their summer holidays. When "Sandy's" family moves after the summer, she coincidentally starts attending the same school as "Danny" - and so the love story begins...