Brady attempts to heal his relationship with Robyn by arranging an anniversary re-do date. Nonie worries about her difficulty getting pregnant. Big change is coming since three daughters are graduating high school and want to move out for college.
Brady shocks the wives when he proposes a change that will throw everyone's routine into chaos. Daughter Karlie has returned to Utah, and she reveals a big secret to the family.
The sister-wives hope that all of their extended families will accept the invitation to celebrate the 4th of July with them. Robyn's daring double-date is not what she anticipated; Rhonda makes a big life decision when her youngest faces a major health scare.
As Rhonda anxiously awaits the results of her mammogram, her sister-wives plan a "mammo party"; Robyn is writing and illustrating a children's book inspired by her son's bullying; the entire family helps daughter Taylor raise funds to volunteer in Peru.
For the first time in 10 years, the Williams family road-trips to Seattle to visit Brady's parents. Grandpa Rod leads the kids on a Big Foot hunt, while Grandma Stella delves into issues with each wife. They all celebrate Stella being five years cancer-free.
As the Williamses continue their fun-filled visit with Brady's parents in Seattle, Brady and the wives tour local properties they could potentially make their new home. Later, Nonie shares an exciting secret that will affect the entire family.
Back home from Seattle, it's time for Rosemary to send daughter Taylor on her life-changing mission trip to Peru. Inspired to make her own life changes, Rosemary starts trying to get healthier. To support her, Karlie plans a fun family decathlon.
The wives confront Brady with their frustrations after he tells them that a new side business will be taking up more of his time; when all 5 wives want to go line-dancing, they arrange a "mega-date" with Brady; the family has fun putting on a film festival.
Brady surprises Rhonda with a Las Vegas getaway to celebrate their 15th anniversary; Robyn shakes things up when she asks for two nights with Brady; Paulie's son Josh, beloved big brother to all of the children, departs on a two-year mission trip.
The family's move could become a reality when Brady has their homes appraised; Brady's mounting stress gets the better of him, sending him to the ER; Nonie discovers her baby's sex; Paulie's daughter Karlie gives birth prematurely.