Paris is at the Capulet's tomb laying flowers for Juliet.  Romeo comes along, and Paris thinks he should capture him because he shouldn't be in Verona.  Paris and Romeo get in a fight, and Romeo ends up killing Paris.  Romeo goes into the tomb, admires Juliet one last time, drinks his poison, and dies.  Friar Lawrence arrives, and sees Balthasar.  Balthasar tells him that he is in the Tomb with Juliet.  Friar Lawrence runs in, and finds Romeo dead.  Just then, Juliet wakes up, and sees Romeo dead.  The friar urges Juliet to get out, because they would get in trouble found in there.  Juliet refuses, takes Romeo's dagger, and stabs herself, figuring she'd rather be dead than without Romeo.
    The friar is caught as he is leaving the tomb, and tells the Prince what happened; basically summarizing the whole play.  The Capulets and the Montague's make up, realizing that their fighting has caused the death of many people.  That is the end of the play, cool, huh?