Walker

A Walker is someone with heightened senses, stronger and faster than regular people- and they've existed alongside normal folk since the dawn of time. A Mute is slang for a 'normal', someone without a Walker's gift.

Gray Kubrik is a Walker assigned to a team of Mutes dedicated to bringing down the Coalition Countries from the inside out. Amongst other things, the team is sucked into a conspiracy spanning years and continents- the Mutes have started a revolution.