While he rents out his house, Joel and Sam revel in the highs of their temporary living situationship - and the lows of cleaning up after strangers. Meanwhile, as a newly single Tricia preps for an empty nest, Sam is overcome with unexpected emotion as she begins to clean out the barn.

At poker night, Fred throws Sam, Joel, and Tiffani a curveball. Meanwhile, Sam attends a former voice teacher's concert in hopes of becoming her student again - with unforeseen consequences, and Tricia feels the effects of a small town filled with big talkers.

As Mary Jo's behavior worsens, Sam and Tricia grapple with the difficult decision of escalating her care. Then, as Tricia pitches her services for Fred and Susan's wedding, Joel has a crisis of faith, and Sam struggles to get back in touch with her instrument.

While on their way to Wichita, Sam and Tricia finally tell Mary Jo why they're temporarily moving her from the care facility. After accidentally blowing his own cover stalking Brad, Joel opens up about his personal crisis stemming from Fred's upcoming wedding.

While celebrating Tricia's birthday, Sam is blindsided by surprising new information about Holly. Then, as Charity's lies continue to affect Tricia's social life, Joel makes a move with Brad... which leads to a misstep with Sam.

Distancing herself from Joel, Sam concentrates on helping Tricia with her blossoming pillow business - which soon faces sabotage from Charity. Meanwhile, Fred attempts to play peacemaker with Sam and Joel.

After reuniting with Joel at a funeral, Sam takes stock of herself and her actions - and decides to make things right with her best friend. Then, everyone comes together for an epic celebration of love and partnership at Fred and Susan's wedding.