Three hundred years in the future, humanity has expanded into space, and mechs have become a mainstay of both military and civilian life. Struggling to make ends meet, Bai Xiaotian joins the Federal Mech Military Academy as a temporary recruit. With help from the fully automated AI “Pidann No. 7” and the genius technician Eileen, he somehow gets swept up in an interstellar war of aggression. Together with his troublemaking friend Jin Shanshan and the mysterious mech squad captain Du Yuchi, he forms the “Tin Can Squad.” They match wits with the alien prince Anton and experience a wild series of misadventures, bizarre missions, battlefield dangers, betrayals of friendship, and plenty of laughs. In the end, they defeat their powerful foes in a chaotic sea of stars and defend their home, finding personal growth along with friendship, family, love, and a sense of responsibility.