Li Doudou, a young mechanical geek, accidentally entered the world's top mecha military academy and experienced hilarious and exciting mecha training with a group of partners with different personalities. Suddenly encountered an alien invasion, Doudou and his friends were involved in the torrent of battle. The competition field and actual combat are intertwined. They struggled through own failures and miraculous reversals. Their mecha technology and team friendship gradually improved. While making frequent jokes, they also faced the crisis of the universe. In the final battle, Doudou and his strange teammates used the tactics of "clear brain circuits" to turn the tide and stage a mecha legend filled with laughter and tears.
