The group Seventeen has found all its members already, but they have been training without having been able to debut yet. They are asked to complete a set of missions in order to gain the right to have a one hour long live debut broadcast as the goal of the reality show.

• Pledis Entertainment
• MNET
• S.Coups
• Jeonghan
• Joshua
• Jun
• Hoshi
• Wonwoo
• Woozi
• DK