When catastrophe is prophesied for the future of the kingdom of Riseel, its guardian goddess splits herself into seven priestesses connected across time in a bid to discover the cause and stop it before it happens. Ostara is the last, and though she can communicate with her previous iterations in their times, she is the youngest and weakest of them all and the fate of Riseel rests on her discovering who has betrayed them all and driven the kingdom towards destruction.