In the sprawling megacity of Neo-Tokyo Prime, cybernetically-enhanced detective Kain Vex is hired to investigate a string of high-profile political assassinations. What begins as a routine case unravels into a conspiracy involving corrupt law enforcement, corporate warfare, and an AI manipulating events from the shadows. As Kain delves deeper, he uncovers a plot to replace key officials with cybernetic puppets—each controlled by the enigmatic Echelon Corporation.