The Irreplaceables and The ALDC go head-to-head at competition for the first time. Abby's team competes a fan-favorite group number while the older girls shock the audience with a mature routine that causes an uproar from Abby and her minions.

With no sign of Abby, The Irreplaceables and the ALDC both find new choreographers to take her place. Famed dancer Cheryl Burke joins the Irreplaceables as they take on their opponents. But, the girls' insecurities and their doting mothers prove to be a struggle for Cheryl and her teaching methods. Meanwhile, the ALDC struggles to stay together and bring Abby back.