It's wedding bells for Kari and Ryan. Luke and Reagan introduce baby Thomas to the family. Ashley, Landon, and Brooke anxiously await test results. Erin and Sam finally have a conversation about starting a family.

It's Ashley's big opening night at the art gallery, but the troubling news she received from Paris continues to haunt her. Kari looks for the perfect wedding dress, while Luke gets a visit from an old friend. Diane opens up to Kari and Ryan.

Brooke and Peter get good news about Maddie's health scare. Ashley gets more calls from Paris and does her best to keep Luke's whereabouts a secret. Reagan considers reaching out to Luke. Erin opens up with Sam about her desire for a family.

Ashley and Luke's new roommate arrangement isn't going well. Kari and Diane spend the day with baby Jessie. Brooke and her husband Peter take their daughter Maddie to the hospital after she falls ill. Ashley receives profound advice from Irvel.

Lori returns home to work things out with Luke. The Baxters attend a community service project after church. Ashley receives more mysterious calls from Paris. When Luke and Lori attend a protest rally, everything spirals out of control.

On the anniversary of Tim's passing and Jessie's first birthday, Kari debates whether to tell Tim's mom about her engagement. Elizabeth and Lori continue to bond. Erin seeks guidance about starting a family. Ashley gets a disturbing call from Paris.

After recovering from her infection, Lori visits Elizabeth to confess a secret. Kari and Tim look at wedding venues. Ashley gives something to Luke that might help him find his way back to God. In California, Landon makes a life-changing decision.

Struggling with the responsibilities of being a single mom, Reagan confides in Kari. Ashley and Landon attend a trendy art gallery event in Los Angeles. Elizabeth and John's efforts to reconnect with Luke have failed, so Ryan makes one last attempt.