Chemistry genius brother Yuntian took his "annoying" 6-year-old brother Yunxuan on a trip abroad, and was accidentally bound to the "Ancient Rhythm Returning Home" system at the Maple Leaf Kingdom Royal Museum. The system publishes a strange mission mode - a "dramatic public return" method must be used to bring the lost national treasure home. From fighting each other to being forced to form a team, the two brothers used chemistry + hacking + Phantom Thief-style magic props to stage scenes of patriotic comedies around the world that "announced theft → publicly returned". And their homeland, Longguo, went from being confused when they received the first 110 call "I want to donate a national treasure" to setting up the highest-level protection team, staged a warm and secret war of "I know you know I am helping you".
