For the fourth mission, each team must shoot a music video. The Rookie Team is slowly growing through Su Ji's leadership and preparation for the shoot is going smoothly for them. However, the Debut Team has selected a new leader - So Ri.

The Rookie Team is positive Jee Won is the one that stole their clothes for the shoot. Ye Eun can't forget Jee Won's past betrayal and goes on the offensive. This causes the conflict between the two teams to explode!