Dongguo Xiaojie, a young girl, has lived together with her mother ever since she was little. On the year she turned sixteen, her mother suddenly contracted a "Grave Illness". To save her mother, Dongguo Xiaojie set foot into the unknown on a dangerous journey. Accompanying her on this journey is her sworn elder brother Mo Zixuan and the mysterious youth, Life's Hardship. However, danger arises again and again as they...