Most of the world is blissfully unaware of the evil that has been plotting to kill what remains of the Valkyries. Valkyries were once a team of powerful female warriors- united together by the magic inside of a a jeweled pendant that has been passed down from leader to leader through the generations.
The year now, is 2017, and the pendant has been dormant for a few years. Though, it's been in the possession of the new leader of the Valkyries. She, and the other magical girls are ignorant of what evil awaits them. When the six of them end up in hot water, and earn themselves a Saturday detention, they find themselves in a strange world, in strange clothing, and gifted with strange powers they have seemingly little control over.