Being framed by a Mystable user and hated by everyone, Sunset Shimmer runs off back into her apartment. Her door bumps into something half way and discovers an unknown chest, along with the card decks inside as well. Unbeknownst to her however, the first deck Sunset picked up have somehow chosen her of being the new Dark Signer leader as she uses the other decks to find more people to join her side and figure out on what to do next. Perhaps seek revenge on those who've wronged her or maybe something else.