Cheol Yong, whom the members trusted, betrays them and runs away to Lisbon, Portugal, the mecca of backpacking. For perfect infiltration, the secret agents try to disguise themselves as backpackers. For many different types of backpacks, they play Reverse Perfect Pitch where perfect pronunciation and key are important. Will the members win the backpack they want and head to Portugal? Before the flight to Lisbon, Young Ji challenges the production crew to a battle of cooking ramyeon. If Young Ji wins, she can finally put an end to her digital detox and get her phone back. Will she be able to win the match and dive into the world of dopamine again? Stay tuned to find out! (thetvdb.com)