Final answer:
Juliet is supposed to go to Mantua to be with Romeo according to Friar Laurence's plan in Act 4 of Romeo and Juliet.
Step-by-step explanation:
In Act 4 of Shakespeare's Romeo and Juliet, according to Friar Laurence's plan, Juliet is supposed to fake her own death using a sleeping potion, and upon awakening, she would then go to Mantua to be with Romeo, who would be waiting for her after being informed of the plan by Friar Laurence. However, the plan goes awry when the message about the plan fails to reach Romeo, leading to the tragic ending of the play.