Answer:
(This is probably going to be short and a little vague. If you need a more detailed summary just let me know.)
Two families have been fueding for a while, the Montagues and the Capulets. One day the masked Montagues goes to crash a Capulet party (risking more conflict). A young man, Romeo Montague, falls in love with Juliet Capulet instantly. Juliet is to marry a man her father selected for her. However, in the end, they cannot be together because of their families conflicts so they kill themselves because they cannot bare being seperated.