The Rooney house is finally rebuilt and Karen can't wait to have the family reunite in Wisconsin. However, when exciting opportunities arise for each of the Rooney kids, their summer plans are suddenly thrown into jeopardy.

Liv undergoes vocal surgery and is unsure if she'll ever be able to sing again so Karen and Maddie call in reinforcements to help. Meanwhile, Parker and Val are surprised by their competition in the Mars Madness finals.

As the cast of "Sing it Live!!!" gets ready for a live televised show, a vocal injury threatens to ruin Liv's performance. "My Destiny," an original song performed by Dove Cameron, is featured.

Joey is invited to perform stand-up at the hottest comedy club in Los Angeles by his idol comedian Jim Breuer. Meanwhile, Parker enlists Liv and Maddie to help him with a science experiment.

When Maddie and Willow discover that one of their acquaintances is homeless, they set out to help him. Meanwhile, Karen gets discovered by a modeling agent, and Joey and Parker attempt to sneak into a movie.

When Maddie and Josh start hanging out again, Joey feels awkward by their rekindled friendship. Meanwhile, Parker and Val find themselves in a jam when competing for a coveted finalist spot in the Mars Madness competition.

Joey's popularity at school is threatened when an old nemesis from Wisconsin returns and Maddie feels the need to keep a close eye on Parker's new friend.

Liv and her fellow female co-stars of "Sing It Louder!!" attempt to break the stereotype that boys are better than girls at ‘boy stuff' by organizing a woodblock derby race against the boys. Meanwhile, Maddie and Willow take part in a challenge at their local restaurant which has only been won by men before.

Joey is nervous when he's invited to perform stand-up comedy at a local restaurant. Parker finds himself in a predicament when he isn't sure if he's asked his fellow classmate to be his partner in a science competition or his date to a school dance.

Maddie is upset that she can't be in Wisconsin for Christmas and to cheer her up, Liv plans an incredible surprise. Meanwhile, Joey participates in a Mr. North Pole Santa Claus pageant against an old foe and Parker tries to teach Ruby the wonders of a Snow Day.

Liv throws a secret sleepover on the set of "Sing It Louder!!" (complete with waffle bar) to help Ruby and her co-star Priya become better friends. Meanwhile, Joey meets a new nemesis, Skeeter Parham, and Parker reveals a big surprise to Maddie.

When Liv's new show is in danger of being cancelled because they can't find the right cast, Liv helps by searching for the perfect star. Parker concocts a plan to take Joey down, and his new Falcon persona, by having Joey test-drive a dangerous invention.

Liv takes Ruby to a spooky dinner and runs into an old acquaintance and Maddie comes face-to-face with the real-life spider-sprayer. Meanwhile, Parker and Joey must convince their classmates to celebrate Halloween.

Liv lands a small part on the hit show "Linda and Heather," but her role turns out to be bigger than she expected. Meanwhile, Joey deals with relationship woes.

Season 4 begins with Liv, Maddie and the rest of the Rooney family excited to start their new life in California. As the school year begins, the Rooney's cousin Ruby returns home from summer camp and is thrilled to have "sort of" siblings. Meanwhile, Joey and Parker attend their new science and technology school but it's nothing like what they expected.