Episode 1

6 Kpop Girl Groups (AOA, Mamamoo, Lovelyz, Oh My Girl, (G)I-DLE, plus one secret competitor) compete in a comeback war. In this episode, the groups learn who their competition is for the first time, fight over performance order, and the secret sixth challenger is revealed.

Episode 2

After an inspiring start by Mamamoo and Park Bom last episode, Oh My Girl, (G)I-DLE, Lovelyz and AOA perform their hits. The shocking 66 Drop rule is announced, where a team losing twice in a row is kicked off the show. Oh My Girl gets bad news.

Episode 3

Mamamoo and AOA cover each other. A backup dancer choice raises eyebrows - and rankings, as does a surprise guest.

Episode 4

A Queendom quest affects the cover song competition. Two groups that did poorly last competition make desperate and surprising choices, hoping for a big payoff.

Episode 5

The lead singer and lead dancer from each group collaborate and compete as units. The singers fight over who gets a duet with Hwasa.

Episode 6

The dance unit leader is chosen, and a legendary choreographer joins the unit. The voice units perform a demo. The groups become closer with each other at a retreat.

Episode 7

The vocal and dance units perform.

Episode 8

The "Fandoras Box" challenge, where each group performs a fan-chosen song.

Episode 9

The winners of the combined Vocal Unit, Performance Unit, and Fandora contests are announced.

Episode 10

All the groups perform their comeback hits. A winner is announced.