A story about Joongki and Jihyo as brothers and sisters. They went filming for Running Man and the mission today is so exciting; Sibling Race. The couples are ; Song Song couples, Easy Brothers, Jongkook and Haha(hyung and dongsaeng) , Jaesuk and Gary.      They have to protect their couples and search for 5 items hidden in the building. Each item is in a box and there will be the couple's name at 3 boxes. There are some fake ones and if they opened the fake ones there will be a pu