Grease is a rock and roll musical about the romance between a greaser, Danny Zuko, and a sweet new girl, Sandy Dumbrowski, at Rydell High in 1959. The story follows their rekindled relationship amidst cliques and peer pressure, featuring classic songs like "Greased Lightnin'" and "Summer Nights". It is a celebration of youth, friendship, and rebellion, with the stage version being a bit grittier than the film adaptation.