The time of change is on the threshold for fifty-three-year-old Kaj, who recently has started to question his authority as Sensei. After a workplace accident, Kaj is forced to find a way out of the past and a way into the present.

A singer in a bar full of weird people and mutants sing the story of an abandoned robot that is reactivated hundreds of years after an apocalyptic war. Wandering off searching for his origins, the robot meets characters of the ruined world, mutants, adventurers and common people. Always set to help humanity he makes both friends and enemies.