About two years ago, his team carried out a special operation to clean up the den of bandits known as "Insindikat" but cops were ambushed. Most of the soldiers were killed, the other seriously wounded, while a robot policeman who accompanied them on a mission refused to assist because people's chances of survival were very low, he saved himself. As a result, the entire team including the capture and partner John dies. That's when the explosion permanently crippled detective and now he has to put up with a cybernetic prosthetic leg and huge gaps in memory.
Police agrees to cripple the work only on one condition, his partner must be a robot class DRN - as close as possible to the person and endowed with synthetic soul. The unique machine is trying to make friends with John, but faced with fear, contempt and misunderstanding.