Liv, Maddie and the rest of the Rooney clan start their new life in California; Ruby comes home from summer camp and gets excited to have sort-of siblings but ends up in the middle of a sister fight between Liv and Maddie.
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''; Parker and Joey must convince their classmates to celebrate Halloween.
Liv and her fellow female co-stars of "Sing It Louder!!" attempt to break a stereotype by organizing a woodblock derby race against the boys. Meanwhile, Maddie and Willow take part in a challenge at their local restaurant.
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.
After Liv undergoes vocal surgery, she is unsure if she'll be able to sing again, so Karen and Maddie call in reinforcements to help; Parker and Val are surprised by their competition in the Mars Madness finals.