On the eve of Raquel and James' engagement party, Scheana and Brock make a big announcement that sends shock waves through their friend group, while Sandoval confronts Lisa about her lack of support for the Toms' new bar. Meanwhile, Katie and Ariana get some good news about their own business, Raquel has a heart-to-heart with her father about her relationship with James, and Lala reveals a huge secret that turns the party on its head.