Pluto

Gesicht, a Europol android detective, is assigned to investigate the death of Montblanc, a celebrated retired war robot. The case quickly turns unsettling: the evidence suggests a robot could be responsible, yet the murder of a prominent robot-rights advocate complicates the picture. With robots supposedly unable to kill humans—aside from a single unexplained incident eight years earlier—Gesicht is left to weigh an impossible question of identity as clues at both scenes point to the same perpetrator.

When another veteran war machine is assassinated, a clear pattern emerges. The victims are among the seven most formidable combat robots ever built, and someone appears intent on erasing the remaining five. Racing to prevent further killings, Gesicht turns to Atom, an advanced android with the appearance of a young boy, and together they pursue a killer whose existence threatens the foundations of their world.