The Brineys, Snowdens and Alldredges are in various stages of seeking a sister wife; with the arrival of their third wife, the Brineys all move under one roof; after a breakup, the Snowdens begin their search; the Alldredges seek a third.
After meeting someone online, the Snowdens worry about how their family will respond; the Alldredges decide whether or not to move forward with Melina; the Brineys adjust to their new wife with impending legal issues.
The Alldredges and Snowdens hope to finally meet their online potential sister wives face to face; tensions grow among the Briney sister wives, April and Auralee, and Angela Briney wonders what she has gotten herself into.
April and Drew Briney celebrate a milestone anniversary while Angela and Auralee tend to the children; the Snowdens forge ahead with potential sister wife Joselyn; the Alldredges regroup after Melina doesn’t show up and focus on Vanessa’s pregnancy.
Vanessa's pregnancy is in jeopardy and she faces a life threatening surgery. The Snowdens meet up with Joselyn to see if she will come clean about sleeping with Dimitri. The Brineys go camping in hopes of easing the tension amongst the three wives.
The Alldredges' world is rocked by an unexpected phone call. Ashley Snowden proposes a new potential sister wife. The Brineys get some shocking news that threatens to tear them apart.
April struggles with leaving Utah and threatens to tear the Briney family apart; the Snowdens decide whether to forge ahead with potential sister wife Jakira; the Alldredges find out Melina's decision.