Hart is a marshal, tasked with patrolling the magical wilds of Tanria. It's an unforgiving job, and he'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-ache Hart, the man with a knack for showing up right when her patience is thinnest.

After yet another run-in with Merciless Mercy, Hart finds himself penning a letter addressed simply to "A Friend". Much to his surprise, he receives an anonymous reply, and a tentative friendship is born. Little does Hart know he's baring his soul to the person who infuriates him most...