The Snowdens and the Alldredges court a new sister wife; elsewhere, young newlyweds, the Winders, still have a plural marriage in secret; the McGees seek their first sister wife.

Vanessa experiences life as a Snowden; the McGees tell their sons they want to seek a sister wife; the Winders go out in public as a trio for the first time; the Alldredges wonder if their potential sister wife, Jennifer, will show up on their date.

The Alldredges’ potential sister wife throws their courtship off track; Vanesa throws a curve ball at Dimitri on their date; the McGees move out of their camper for more space and privacy; the Winders take a public stand for their plural lifestyle.

Surprises are in store when Jeff tells his wives about Jennifer's abrupt exit; Dimitri decides to introduce Vanessa to Ashley's mother without telling her; the McGees video chat with a potential sister wife; Sophie Winder's family visits.

The McGees set ground rules for courting and intimacy and ask a potential sister wife to meet in-person; the Winders launch their online dating profile; the Snowdens decide to make a move that could impact Vanessa's life in a serious way.

The Snowdens arrive in LA and hope their relationship with Vanessa will still work under one roof; the McGees nervously prep for Brandy's arrival; the Alldredges ask Jennifer to come for a visit; the Winders find a possible interest online.

Vanessa and her sister clash over her choice to join a polygamist lifestyle; the Alldredges prepare for Jennifer's visit until Jeff gets a strange text message.

A series following three families in various phases of adding a new sister wife to their lives.

The Alldredges are shocked by Jennifer's mysterious behavior while the Winders finally video chat with a potential sister wife. Paige questions if this lifestyle is what she really wants, and the Snowdens prepare for Dimitri and Vanessa to be intimate.

The Snowdens look toward the future after Dimitri and Vanessa become intimate, but Ashley surprises them with some news; Brandy reunites with the McGees; the Alldredges are shocked by the latest Jennifer news; the Winders discuss their future.

The Alldredges, Snowdens, McGees, and Winders all meet for the first time to answer tough questions about each of their journeys in plural dating and take a deep dive together into the season’s juiciest moments.