After Liv realizes just how much Parker has grown up while she was away, she volunteers to supervise his sleepover in hopes of reconnecting with him. But when all her activities backfire and start to embarrass Parker in front of his friends, Liv has to up her game in order to impress her little brother. Meanwhile, Maddie and Willow work on a school project, and Joey and Pete go on a road trip to the Pastrami Palace that leads to a wild night of fun.

Maddie and Willow are excited to try out for the school's varsity softball team, but Maddie, the catcher, realizes that Willow, the pitcher, is in a slump because she can't stop thinking about Joey.

In an effort to help Maddie bring out her “girly side,” Liv gives her a pair of the most comfortable high heels ever made.

Liv must finish a 6th-grade project to avoid taking summer school. Joey gets Maddie to teach him how to be a jock to impress a girl.

Before he leaves for Australia, Diggie needs to tell Maddie how he feels. Meanwhile, Parker, Reggie and Evan swear they will remain on the couch until the new season of Linda and Heather is released.

Maddie and Willow join in on the Senior Scare, in which high school seniors scare middle school students; Liv and Joey head to New York.

A reporter mistakes Maddie for Liv while she's on a date with Josh. Maddie doesn't want Diggie to hear the news from the press, so she asks Liv to play along.

Liv is not too happy when Joey lands a part on “Voltage.” Meanwhile, when Karen finds out that Andie's dad, Mr. Bustamante, disapproves of Dump Truck, they team up to change his mind. Josh has been really depressed since his split with Maddie and Liv realizes having Joey around cheers Josh up so gets him a small role in Voltage, but he takes it too far.

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.