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Long ago, when the Earth was still young, Arceus was finishing creating the four regions of Kanto, Johto, Hoenn and Sinnoh. However, he accidentally released a flash of ice over an unoccupied area further away from the above mentioned regions, carving the corpse of a Pokemon we nowadays know as Kyurem. Arceus took a liking to its accidental creation and gave it a heart to love, a mind to feel and a soul to protect. However, its new creation was unbalanced, and as such, it needed somebody that could guide it into the right path.
Humans. Two twins, Ro and Ka, were each made from a single fragment of Kyurem's soul and were given orders by Arceus to create a land of peace, a land of harmony, where people and Pokemon alike could live together. Of course, the twins obeyed their orders. And so Unova was made.
From a small hill to an huge region, Unova blossomed and bloomed into the Unova we know today. It seemed like a perfect paradise for people and Pokemon alike.... Not for long, though.
The brothers started arguing over something each sought in life; the older brother sought truth and the younger brother sought ideals. Their arguments split the single dragon into Reshiram, who sided with the older brother, and Zekrom, who sided with the younger brother, leaving Kyurem's corpse without a heart, mind and soul. Since they were both born from the same dragon neither could defeat the other and the brothers declared that there was no right side. However, eventually their sons continued the fight and both the dragons started to battle again, destroying the Unova region with their fire and lightning powers before Arceus decided to put an end to this and put both Zekrom and Reshiram to a millennium-long sleep, awaiting the birth of new pure-hearted Black and White heroes that will put the use of the two Tao Dragons to good use.
Now, 2,5 million years later, a young girl by the name of Lindsey is about to depart on her journey - her sister and the champion of Unova, Cordelia, is however worried about her, so she sent Lucia, the younger sister of her good friend, rival and champion Gary Oak, who dragged - unwillingly - her twin brother, Lucifer along. The trio departs on an adventure, not realizing what danger lies in front of them, and that they have a great responsibility in front of them. Will Team Plasma rule again? Will Unova stay in one piece? Will they be able to tame the Tao Trio?