When a clumsy water nymph accidentally forces two girls into begrudging magical girl-hood, they discover that life as a magical girl may not be quite as peaceful as it seems. With a missing magical girl, a useless sidekick, and the looming threat of a millennia-old secret, Candy and Ai are going to have to put aside their differences and find out who they can truly trust if they want to get out of this alive - assuming they don't cave under the pressure first.