This is a summer that is as hot as it can be. Seven good friends of the Science Fiction Association: Hashimoto (played by Yingtai), Zeng I (played with Jiaqiu), and Yoshinori (Ueno) stay and play in the school. One day, they suddenly found a time machine popping up out of thin air in a corner of the room! The agitated crowd began to talk about their time journey, and they unanimously decided to go back to the air conditioner remote control they accidentally broke yesterday-it's hard to live without an air conditioner in this weather. People who travel through time and space are not skillful, and wantonly changing the past may lead to adverse consequences. "if it is serious, everything will disappear." The researcher Sui Ji (acted the role of Muki) made such a judgment. People began to panic, for a small remote control, they should disappear?