Last week, the members of Running Man were given badges according to their levels. However, they become aware that some of the levels have been fabricated. Among five of the guests that have been invited today, there is a forger who fabricated the levels. The members must get to the bottom of what happened.

This week, the members are joined by Lee Dong Hwi. Their names are taken away, and they start to be called by the way old people used to call children before Children's Day was founded. In order to get back their names, they play rounds of games. Those who fail to retrieve their full names face a penalty.