According to the demon lore, it takes hundreds of years to attain human form. Even then, lacking a human heart, a demon cannot experience the true pains and passions of existence. However, there is a legend that if a pure human heart is offered willingly by a human to a demon, the demon can become a mortal and experience true life. Xiaowei, a fox spirit, has been imprisoned for centuries under a frozen lake for violating the laws of the demon world....

Some believe that our world is one of many, that our existence is merely an intersection between countless dimensions - known and unknown. We run into strangers we don't see, hum tunes we don't hear. Some risk everything for a glimpse of the other side.