Kody and the sister wives are put to the test like never before after Meri confesses to being catfished into an online relationship with a woman impersonating a man. The family—devastated and confused—struggles to come to terms with the situation and enlists the help of their therapist to begin the long healing process and build back the trust that was lost. Despite this family conflict, there is still plenty of celebrating within the Brown household as wedding bells and a new baby are in the near future. Madison takes her relationship with Caleb to the next level, announcing to the family that she is engaged and moving to Montana to be closer to her fiancé. Robyn and Kody have the final meeting with their midwife before the birth, and they do their best to prepare Solomon for his baby sister while the rest of the family waits to welcome the Brown's 18th child.
