Baylen travels to Texas for a Tourette convention, but her tics threaten to overpower her big moment. After connecting with new friends and a doctor who suggests a radical treatment, it all proves too much for Baylen when she suffers a severe tic attack.

After suffering a terrifying tic attack, questions are raised about Baylen's ability to live on her own. Baylen and Colin decide to take a big step in their relationship, but the excitement is short-lived as they begin sharing the news with their families.

Baylen and Colin are excited to live together but they need an approval from Colin's very conservative parents first. Allen, still uneasy about their decision, talks man to man with Colin. Baylen tries Botox to help with her tics. Colin drops a life changing bomb.

After an eventful apartment hunting adventure, Baylen and Colin move in together, but outside forces bring everything to a halt. At Baylen's birthday party, tension is in the air as Colin's birthday surprise royally backfires, leaving Baylen wondering if they're on the same page.

After a huge fight at Baylen's birthday party, Colin works on rebuilding trust with her family. Allen and Julie worry Baylen's tics are getting worse and wonder if Deep Brain Stimulation could be an option. Colin breaks the news to Julie and Allen about his true intentions with Baylen.

Colin seeks Baylen's parents' blessing to propose to her during their family vacation. Baylen and her parents meet with a neurologist to discuss Deep Brain Stimulation. Colin realizes its going to be an uphill battle after a secret meeting with Allen.

The Duprees head to the beach for their annual family vacation where Colin secretly plans to propose, but a brewing thunderstorm threatens to ruin his proposal plans. Sammi takes the opportunity to share some long-harbored concerns with Baylen. Baylen and Colin drop one last bombshell on the entire family.