There are lures irresistible regardless of peril, because some yearnings renounce all wisdom. There are bonds that compel no matter how faraway, because some needs are dire enough to defy all cost. But when reason, distance, and danger go unheeded, that price can be devastating despite all the magic in one's grasp. A Sister to Butterflies tells a different sort of once upon a time, a shimmering tale of a creature torn between worlds, whose wondrous deeds would become fable, and whose terrible mistakes would alter the destinies of everyone around her.