Thousands of years into the future after humanity is nearly eradicated through a mass extinction event, animal human hybrids are the survivors. Technology is looked upon with fear and prejudice in these times, and things are simpler and more primitive than the world we know. The protective and anxious Eru and her adventurous, imaginative daughter Ritsey live along side their Vulpian (fox/human) clan and fight to survive this world as the forces around them threaten to swallow them whole.