Act III, Scene I: What plan does Hero and Ursula have at the beginning of the scene?

Hero tells her servant Margaret to fetch Beatrice and tells her that she overheard Hero and Ursula gossiping about Beatrice in the orchard. Hero then orders Ursula to talk about Benedick as if he were madly in love with Beatrice. She agrees, and they wait until they see Beatrice hide herself in the orchard before walking towards the hiding spot.

Whisper her ear and tell her I and Ursula
Walk in the orchard, and our whole discourse
Is all of her. Say that thou overheardst us,
And bid her steal into the pleachèd bower
Where honeysuckles ripened by the sun
Forbid the sun to enter, like favorites...Act 2 sc1 line 3-9