While Bill seeks protection against the religious compound led by Roman Grant, things heat up between the sister-wives over Margene's overtly sexual behavior. Roman "The Prophet" asks Bill's father to act as a go-between to deliver a message to his son, and the Hendricksons get together for a family dinner with Bill's business partner and his three wives. Meanwhile, Margene pressures Bill about buying her a car and Ben goes out on a date with a girl that seems too mature for him.

Bill goes on a hunting trip with his son Ben, Barb tries to get accredited as a full-time teacher, and shopaholic Nicki realizes she can't pay her credit card bills. Meanwhile, Sarah goes to a house party but ends up needing her friend Heather's help.

Nicki suspects that Bill is having an affair and is considering bringing a fourth wife to the family. Margene, feeling alone in the big house, befriends the new neighbor, Pam Martin. Bill goes after Roman and tries to expose him, but polygamy accusations also fly in the Home Plus. Meanwhile, Ben is trying to cope with his arousing sexuality and being a teenager.

Bill considers running an expensive advertising campaign, Barb finds out about Nicki's secret, and Margie goes to church with Pam, their neighbor. Meanwhile, Sarah brings home a surprise guest, and Ben goes on a trip with his friends.

After they're outed as polygamists, Barb decides to leave the family while Bill starts an investigation of who leaked the information. Meanwhile, Sarah attends a support group for ex-Mormons

Nicki goes back to the compound for a family reunion, bringing Bill with her, where they find out the extent of Roman's betrayal of their family. Barb is annoyed by Margene and Ben's behavior. Meanwhile, Alby disobeys his father.