When Star refuses to solve a problem in math class, she learns that avoiding her least favorite subject may have cosmic repercussions.

Hoping to help her forget about her strained friendship with Marco, Star's friends convince her to ditch the Diaz' end-of-the-school-year party for a more dangerous bash.

Moon and the Magical High Commission put Eclipsa on trial for her evil past with Star as a key witness.

Star becomes acting Queen and plans for Marco and his warriors to delay Meteora from reaching Castle Butterfly long enough for Star to find Moon and destroy the monster princess.

Tom learns how to have fun without Star.

Star plans a coronation for Eclipsa to become Queen.

Star arrives in Mewni as a soldier attacks Monster Castle.

Moon and Mina agree to disagree.