Sun Hi gets closer to finding out Corki's secret, while Valerie steals the dance moves Jodi choreographed for the girls' Wonderful Wizard of Oz audition.

It's the band's debut at Club Ry Ri, but Sun Hi loses her voice and Corki is too afraid to go on without a disguise. Can the band pull it out of the fire?

Head cheerleader Valerie and her entourage befriend Corki, who instantly leaves Sun Hi and Jodi behind. Will Corki come around or is she lost to the cool kids?