In romeo and juliet, what plan does friar laurence come up with for romeo?

The Friar proposes a plan; 

That Juliet does agree to go through with the wedding to Paris, but on the night before the ceremony, she should drink a sleeping potion that will make her seem lifeless or dead to her family and loved ones. Then Juliet will be put to rest in the Capulet tomb and then the Friar will send a messenger to fetch Romeo from Mantua, and the messenger will explain the plan. Romeo will arrive and help awaken Juliet.