More than seven years after the world has become a frozen wasteland, the remnants of humanity inhabit a gigantic, perpetually-moving train that circles the globe as class warfare, social injustice and the politics of survival play out.

Although Yingying’s mother was killed in a modern day persecution and the little girl is alone on the streets of Northern China, an enchanted art form could reunite them. Enter a child’s world, where hope and imagination are more powerful than police batons or state-sponsored violence, where noble determination conquers all.