Evan had an alright life. A job he didn't mind. And a long-distance girlfriend he was pretty fond of. "Had" being the operative word here. Now, after losing his job and his girl on the same day, a chance hookup with a mysterious girl turns him into GUNPUNCH, Earth's last hope against the invasion the evil shape-shifting Draxans are plotting on our planet. Or at least that's what he believes. Also, it sounds way more glamorous than it actually is. To be honest, Evan is not that psyched about it.

But at least his recruiters, the United Planets Coalition, pay alright. Kinda. Look, he really needs a gig. Armed with a high-tech symbiotic armor grafted onto his body, Evan will try to eliminate all Draxans in his path, before they can take over every human being's body on this planet and complete their invasion. His sister D, the alien holo-construct Nell, Bob the criminal, Dee's friend Stace, and a few more "colorful" characters will be along for the ride helping Evan out. Not that he asked any of them, but you know, they're kind of around I guess. Through all of it, Evan will have to deal with the city's reaction to their new hero, the huge expectations of this new mission, his old boss Alice Magnus, and with the fact that maaaaaaybe they didn't really tell him the whole truth when they picked him for the job.