Lucas loves robots. Especially the robot in the playground near his new house. How he wishes that the robot would come to life, and one night, after a big storm, he does! Somehow, the lightning recharged the robot’s battery, so when Lucas comes to him after the storm, the two of them have fun playing all night. Lucas and his new robot friend forge a friendship that will have a deep impact on Lucas, for years to come.
Okiku is a lonely soul. She has wandered the world for centuries, freeing the spirits of the murdered-dead. Once a victim herself, she now takes the lives of killers with the vengeance they're due. But releasing innocent ghosts from their ethereal tethers does not bring Okiku peace. Still she drifts on.
Such is her existence, until she meets Tark. Evil writhes beneath the moody teen's skin, trapped by a series of intricate tattoos. While his neighbors fear him, Okiku knows the boy is not a monster. Tark needs to be freed from the malevolence that clings to him. There's just one problem: if the demon dies, so does its host.