Andi's world turns upside down when her older sister, Bex, returns home on her 13th birthday and reveals a family secret.

Andi decides to keep the news about Bex from her friends.

Andi gets in trouble for the first time at school.

Bex throws Andi a house party!

Andi's upset when Buffy and Bex spend time together.

Andi tells Jonah about seeing Amber with another guy.

Bex and Cyrus have news for Andi.

Andi must adjust to Bowie being in her life full time.

Jonah asks Andi to help him pick out a gift for Amber.

Andi and Bex adjust to their new living arrangement.

Bex helps Andi stand up against the new dress code.

Amber fails to defend Jonah when her friends mock him.

Andi anxiously awaits Jonah’s return from summer camp; Andi is surprised to learn who Buffy likes; Bex gives Celia a makeover.

Friends and family gather to celebrate the Harvest Moon Festival, but Jonah's mishap may spoil the evening; Celia attempts to one-up her sister, Mei, by announcing a special event; Andi and Jonah have a heart-to-heart talk about their relationship.

Andi's plans for a group outing with Buffy, Cyrus and Jonah are interrupted by Walker; Bowie's new guitar student proves to be a challenge; Cyrus seeks an alternative to P.E. and ends up in a dance class.

Andi is embarrassed when Jonah performs a song about her; Bowie decides to renovate Bex and Andi's apartment to make it big enough for their whole family to live in; Buffy conducts her first girls' basketball team tryouts.

Feeling left out by her friends, Andi spends time with Amber; Andi and Celia pick out Bex's wedding cake; Bowie helps a guitar student break some bad news.

Andi, Bowie and Bex are surprised by an impromptu visit by Bowie's mother; while hanging out with T.J.'s friends, Cyrus faces a dangerous situation; Buffy and Jonah learn a secret about their school principal.

Andi questions her friendship with Buffy; Cyrus comes clean with his friends.

Andi gets in over her head when she attends a high school party with Amber, causing Bowie's plans for a romantic outing with Bex to go awry; Cyrus tries to mend a longtime rift between Jonah and T.J.

Invitations from a secret society at school cause tension between Andi and her friends; Bex and Celia search for the perfect wedding dress.

Andi lends a hand when Buffy's coaching skills are tested at the school's first girls' basketball game; Amber helps Cyrus create a dance routine; Libby is disappointed that Jonah hasn't learned sign language.

Andi, Buffy and Jonah support Cyrus as he sits shiva for his grandmother; Bowie's homemade kugel dish creates a scandal.

Andi, Buffy and Cyrus worry about Jonah's unusual behavior; Miranda tries to cause problems for Bowie and Bex.

Andi attempts to enlist her friends in an epic group costume; Amber continues to vie for Jonah's attention; Bex makes a confession to Andi.

Andi releases her frustrations about Bex and Bowie’s canceled wedding; Cyrus invites Jonah to a backyard campout; Buffy competes in a marathon with Marty.

Andi, Buffy, Jonah and Cyrus take a stand against a wasteful clothing company; Cyrus is disappointed by T.J.’s new friendship; Celia refuses to forgive Bex.

Andi creates an art project to combat stereotypes; Bowie reveals his true feelings about the wedding; Jonah and Amber are not on the same page with their relationship.

Andi learns about a life-changing opportunity; Cyrus counsels Amber about her relationship with Jonah; Buffy has an awkward meeting with Marty’s ex.

Andi makes a big decision about her future; T.J.’s act of kindness toward Buffy lands him in trouble; Amber asks Jonah for some space.

Andi and her family take a road trip. While helping Jonah move, Buffy and Cyrus are surprised to learn the identity of his famous mom.

When Celia leaves town, Andi and Bex throw another party; Buffy and Cyrus share relationship woes; Andi shares a secret.