The Chorus delivers a fourteen line sonnet, in which it states the topic of the play. In the city of Verona, there are two noble houses that hold an "ancient grudge" against each other, resulting in bloody clashes. From these two houses will emerge two "star-crossed" lovers (1.p.3-6). The lovers will heal the rift between their families by dying.
The Prologue introduces themes of love and death and individual vs. society. And by revealing that R and J will die, the Prologue goes further with fate: it literally creates their fate. R and J are fated to die because the Prologue says they will.