"Runningman" is the pinnacle of a variety show created by regular members such as Yoo Jae Suk, Kim Jong Kook, Ji Suk Jin, Lee Kwang Soo, Kang Hee Gun, Song Ji Hyo, and Ha Dong Hoon. Later, Kang Hee Gun quit midway and Jeon So Min and Yang Se Chan joined. As Brother Gou and Lee Kwang Soo left one after another, many regrets were left behind. On the day Lee Kwang Soo left, the activation ability of the "time controller" HAHA allowed them to return to the place where the dream began in 2010. This time they became RM agents who specialize in solving mystery and suspense problems. This is a brand new journey. This time they will encounter those difficulties again. Will they be able to make it to the end?