Dr. Bazz is headed to planet Fluver to study the Sungold in the mines, but he bumps into Robot Big One that tries to attack him…

Luckily, the Letrabots are ready to save him; the Numbers have in fact been hypnotized by an unknown enemy and are headed to the mines to stole the Sungold.

Apolion and Dr. Bazz try to stop him with Big Robot Zur’s help.