John and Elizabeth sell their house. Kari prepares for Jessie's first birthday. Ashley misses Landon, who is battling fires in California. Luke is living with Lori, but it's trouble in paradise for the young couple.

Landon spends time with Reagan in the hospital. Kari goes wedding dress shopping. Ashley moves forward with painting and looks for opportunities out West. Luke's life unravels, and John meets a Vietnam veteran who shares a valuable lesson.

With the pressures of planning a wedding mounting, Kari joins Ashley on her trip to California. Landon spends time with Reagan as she struggles to cope with being a single mom. Pregnant and scared to tell Luke the truth, Lori reaches out for help.

Ashley confronts Landon about what she saw in the park. Kari makes a shocking discovery. Luke approaches Lori about the lies she's been telling him. Later, Lori falls ill and is taken to the hospital under John’s care.

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.

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.

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.

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.

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.

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.

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.