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.

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.

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.