Liv, Maddie and the rest of the Rooney family are excited to start their new life in California. As the school year begins, the Rooney's cousin, Ruby, returns home from a summer trip. Excited to have "sort of" siblings, Ruby can't wait to finally be a sister but finds herself in the middle of a sister-fight between Liv and Maddie. Meanwhile, Joey and Parker attend their new Science and technology school and their experience is not what they expected.

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

Liv has a sleepover to help Ruby and her co-star Priya become better friends; Joey meets a new nemesis and Parker reveals a big surprise to Maddie.

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.

Joey is nervous when he's invited to perform stand-up comedy at a local restaurant. Parker finds himself in a predicament.

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'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.

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.

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.

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.

As the cast of "Sing it Live!!!” gets ready for a live televised show, a vocal injury threatens to ruin Liv's performance.

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.

After exciting opportunities arise for each of the Rooney children, their summer plans are thrown into jeopardy.