When down-on-his-luck swordsman Erich von Jülich-Berg accepts a job protecting Walther the Artificer on a trip from his village to Free City of Köln, his only motivation is to replenish his empty purse. Walther’s twin daughters Ariel and Astrid, skilled mages in their own right, are in search of a husband. But marriage for mages carries with it unique challenges, for their mate will be chosen solely by their place in the magical Flow—not their hearts. Erich soon finds himself caught up in a dram...