Idol Star Athletics Championships is here once again with a Chuseok Special. Female idol members compete with each other in rhythmic gymnastics. Among the contestants, Cheng Xiao of WJSN is feared by the rest. For men's archery, BTOB and Monsta X have a match. To the fans and the commentators' surprise, BTOB dresses up as Legolas and Cupid. Real Makdribble and Goaldesliga go head-to-head in a special match to take the gold for futsal. With unexpected twists and turns, you can't help but to be at the edge of your seat during the match. The 400m relay for both men and women take place. Will BTS win their third consecutive gold medal? Tune in to find out.