The story of the Japanese Mythical creatures and their struggle against life and their dark souls.
Long ago their were some people, people that were deeply connected to the Ki, (the life force.) These people were blessed with the power to turn into mythical creatures. But, with great power, comes great risk.
The people that were blessed unlock their powers when they find their heart, but every heart has a dark side and every creature has a dark-counter part. In order to save the Ki that covers the world, much like a blanket, they must conquer their evil together.