Hart is a marshal, tasked with patrolling the strange and magical wilds of Tanria. It’s an unforgiving job, and Hart’s got nothing but time to ponder his loneliness.

Mercy never has a moment to herself. She’s been single-handedly keeping Birdsall & Son Undertakers afloat in defiance of sullen jerks like Hart, who seems to have a gift for showing up right when her patience is thinnest.

After yet another exasperating run-in with Mercy, Hart finds himself penning a letter addressed simply to “A Friend”. Much to his surprise, an anonymous letter comes back in return, and a tentative friendship is born.

If only Hart knew he’s been baring his soul to the person who infuriates him most—Mercy. As the dangers from Tanria grow closer, so do the unlikely correspondents. But can their blossoming romance survive the fated discovery that their pen pals are their worst nightmares—each other?