A bright but bored boy attempts to rid the world of evil using a strange and deadly notebook that kills anyone whose name is written in its pages. His quest is complicated when a detective begins investigating the murders and he finds himself on the run.
Fourteen-year-old Renton had a fairly normal existence until Eureka crashed into his life -- literally! When the girl smashes her mecha into his father's repair shop and needs help getting it up and running again, Renton agrees, but soon finds himself evading a military attack. Eureka takes him with her to the airship known as Gekko-Go where he meets Holland, commander of the ship and leader of the underground movement known as Gekkostate. Now, Renton is helping to unseat an evil and corrupt government, all the while trying to manage his own adolescent life and get along with the clueless Eureka.