X4-R is a robot, a Zarook, on a planet at the edge of the Hawthorn nebula. He’s a mop. You can call him Xar. His job becomes more complicated when he recieves a small shock and must report to the Diagnostics bay. On his way he meets T1-N4, or Tina, who also malfunctions and teaches him about a ship he never could process before. His directives change, leading to a sequence of events that nearly gets them all shut down.