one sentence summary of Romeo and Juliet.

One sentence? How about,

Romeo and Juliet is about two star-crossed lovers in the depths of forbidden love despite an ancient family feud.

Romeo and Juliet is based on two young lovers from feuding families who hate one another. As only a few days pass from Romeo and Juliet's meeting they get married, get separated, and end up killing themselves because they don't want to live without the other person.