On the eve of Jax and Brittany's wedding, the rehearsal dinner is disrupted when Stassi, Katie, and Lala clash with Kristen, and Jax spills a juicy secret about Katie and Schwartz's marriage. Meanwhile, back in Los Angeles, Lisa Vanderpump orchestrates a big surprise for the bride and groom, Dayna learns that Max may have cheated on her, and James and Max have a boys' night to commiserate over their girl troubles.