In the year 3002, humanity has repeatedly risen and fallen over the course of a millennium, battling a harsh natural world. Construction teams, using powerful heavy robots, are central to society as economic drivers, military forces, and weapons. Jumbor leads a renowned construction team in a small country, protecting a charming princess. During a tunnel reconstruction, a far stronger rival team attacks, claiming the land and killing Jumbor. Jumbor awakens in 3007 in a cloned, partly mechanized body with the mind of his former self but the physical age of five. His robotic arms are controlled directly by his brain, granting him immense power. He learns his country has vanished, the princess and king are missing, and he is the “last of the series.”