It is 1961, two years after the original ''Grease (film)'' ended. The first day of school has arrived ("Alma Mater" from Grease (musical)) as Principal McGee and her secretary Blanche react in horror as the students, among them the new street gang and Pink Ladies, arrive at high school ("Back to School Again"). The Pink Ladies are now led by Stephanie Zinone, who feels she has "outgrown" her relationship with her ex-boyfriend Johnny Nogerelli, the arrogant and rather immature new leader of the T-Birds.