Khloé tries to mediate a fight between Kourtney and Kendall, but ends up making matters worse; Kim continues searching for a cure for her psoriasis; Kris makes herself at home in Kylie's new office space, so Kylie must show her mom who is boss.

Kim gives the world an intimate look into the busiest week of her life as she prepares for the birth of her fourth baby, stars in a music video with Paris Hilton, and heads to the Met Gala. Kourtney feels violated when she realizes someone close to her family has been stealing from her.

Kim becomes too friendly with Khloé's ex. Kylie prepares to debut her Kylie Cosmetics collaboration with Balmain at Paris Fashion Week. Tension boils over when Kim and Khloé confront Kourtney over her recent attitude.