Delphine and Solange are two sisters living in Rochefort. Delphine is a dancing teacher and Solange composes and teaches the piano. Maxence is a poet and a painter. He is doing his military service. Simon owns a music shop, he left Paris once month ago to come back where he fell in love 10 years ago. They are looking for love, looking for each other, without being aware that their ideal partner is very close...

Lorelei Lee is a beautiful showgirl engaged to be married to the wealthy Gus Esmond, much to the disapproval of Gus' rich father, Esmond Sr., who thinks that Lorelei is just after his money. When Lorelei goes on a cruise accompanied only by her best friend, Dorothy Shaw, Esmond Sr. hires Ernie Malone, a private detective, to follow her and report any questionable behavior that would disqualify her from the marriage.

In the slums of the upper West Side of Manhattan, New York, a gang of Polish-American teenagers called the Jets compete with a rival gang of recently immigrated Puerto Ricans, the Sharks, to "own" the neighborhood streets. Tensions are high between the gangs but two kids, one from each rival gang, fall in love leading to tragedy.