A woman whose vision of a perfect life with her adoring fiancé, Nick, and his wonderful family is radically altered when her 16-year-old, out-of-control half-sister, Shannon, unexpectedly comes to live with them.

After learning that Clem doesn’t plan to invite her father to the wedding, Nick’s parents encourage her to ask him over to their home for dinner to help repair their relationship. Also, Nick tries to teach Shannon to be more responsible at home.

When Clem and Nick find out that Shannon stole Walt’s treasured watch, they enlist Freddy to help them get it back from a merciless pawn shop owner.

After Clem and Nick tell Shannon she can’t go to a music festival on a school night, Shannon’s long-absent mother, Jolene, comes back into her life and tries to undermine them. Also, Freddy attempts to help matters in an effort to get back in Clem’s good graces before the wedding.

When Shannon’s bad-news ex-boyfriend, MC DJ JoJo, comes back into her life, Clem and Nick try using reverse psychology to get them to break up.

After Freddy begins seeing Rose for therapy after an incident at work, he inadvertently finds himself trying to connect with Clem more. Also, Walt and Shannon try to help Nick get over his fear of his first wedding dance with Clem.

Clem’s father surprises her with video left by her deceased mother for her wedding day. Also, Clem and Nick run into trouble getting their marriage license the day before their wedding.