In a world where humans have left the surface of the Earth for the protection of underground society, robots have thrived for generations, creating a society of their own on Earth. When a robot exploring a cave runs into a young teenage boy full of hate, the two go on a journey to right wrongs. Back in the present day, an assassin becomes quantumly entangled with an author who finds fascination in his life. How will this assassin handle the charming, snarky woman who wants to write his life story?