In one world, Robin died abandoned by those she thought friends, with the sword of her lover driven into her chest. In another world, a young man with no memories of his past was trusted to guide Ylisse in war. Given a new chance, the broken queen will make sure this young tactician survived, no matter the cost.

With their respective kingdoms at war, Sakura and Leo find themselves mysteriously transported to another realm. Working together, will they be able to find a way to return home? And as they begin to develop feelings for each other and meet interesting friends along the way, will they even want to? [Fire Emblem Fates / Fire Emblem Sacred Stones crossover] [Leo/Sakura]