Explain friar Lawrence plan ?

Friar Laurence proposes a complicated plan to help Juliet reunite with Romeo. The Friar will give Juliet a special potion that will effectively kill her for 48 hours; she will exhibit no signs of life. Following their family tradition, her parents will place her body in the Capulet vault. Meanwhile, Friar Laurence will send a letter to Romeo, instructing him of the plan so that the boy can meet Juliet in the tomb and then lead her away from Verona. Juliet approves of the plan.