Kris takes the family to Wyoming in an effort to ease tension and strengthen their bond, but her plan backfires when the girls start fighting on the trip. Kendall is excited to spend some time with Kylie.

Kim and Khloe are furious that Kourtney is hiding aspects of her life from the cameras, and attempt to fire her from the show. Kim helps a young man, recently out of prison, with his future.

When Tristan starts showering Khloe with gifts, she worries his grand gestures are an effort to win her back; after Kim and Kourtney learn that people are being sickened by toxic waste in a nearby community, they vow to help.

Kim and Kourtney plan a joint birthday party for their daughters; Kris is concerned about some of Khloe's obsessive behavior; after criticism over the name of her shapewear line, Kim faces a difficult decision about the future of her company.

Kris is furious when some slanderous rumors circulate on the 25th anniversary of her friend's murder; Kim struggles to disconnect from work while on a trip to Costa Rica; some of Khloe's past insecurities resurface when she attends her first prom.

Khloe's ex-husband Lamar Odom releases a memoir; an old rumor resurfaces and Kris worries that it will spark a fight between her and Khloe; Kim is nervous to speak at a live press conference at the White House.

After the birth of her son Psalm, Kim plans a surprise vow renewal ceremony; when Kourtney's friends can't get along on a girls trip to Turks and Caicos, she must assert herself in order to salvage the vacation.

Kim has 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 realizes someone close to her family has been stealing from her.

Scott feels pressure to make sure both Kourtney and his girlfriend Sofia are happy on a family trip to Finland. When North gets an opportunity to star in a video with one of her idols, Kim worries that her daughter will have performance anxiety. Khloe plans a birthday trip for her friends Malika and Khadijah but is offended when Malika starts exhibiting diva behavior. North goes on a playdate with JoJo Siwa.

Kourtney and Scott approach the family for parenting advice, but some unwelcome input from Corey leads to a blowout argument between him and Scott. Khloe plans a wine-tasting trip to Napa to check in with Kylie and see how her sister is handling some significant life changes. The family is fed up with Kim's new intense security protocol, so they take matters into their own hands.

After an uncomfortable confrontation with her ex at True's first birthday, Khloe must figure out how to coexist with her ex; Kim accuses Kourtney of copying her style; Kim searches for answers regarding a frightening medical diagnosis.

Khloe invites her ex, Tristan Thompson to True's first birthday party; Khloe decides to throw Kourtney a birthday party, but Kourtney's anxiety about turning 40 threatens to ruin the celebration; Kim receives a devastating medical diagnosis that could change her life forever.