S1, E1: 57 trainees, who aspire to become the next K-pop idol, divide up into three groups of 19. Team Vocals, Team Rap, and Team Performance all show off what they can do in their first Ranking Evaluation. The directors watch and evaluate their performances and give them a score. According to their scores, they are ranked in their team. Who will place first in each team? Stay tuned to find out.