In the distant future, the discovery of the new mineral Orichalt (オリハルト? Oriharuto) has allowed humanity to expand beyond the Sol System. On the constant lookout for Orichalt, humanity has developed I-Machines (Iマシン? I mashin), robots that operate in extreme environments. I-Machines function by transferring a human pilot’s consciousness into the robot’s operating system; in that sense, the human becomes the machine. While Alliance Academy student Maya Mikuri is in the middle of operating an I-Machine, she gets involved in an incident with pirates, and ends up serving as a crew member on an excavation company’s spaceship.
一名學生「米庫莉・麻亞（暫譯，ミクリ・マヤ）」在極限環境中操作作業的大型機器人時捲入了意外中，並被從事海盜一般工作的宇宙船所拯救，之後更成為了他們的一員展開了這段故事……。