When He Ying was five years old, she picked up an injured little fox by the river, and her destiny changed quietly from then on. Ten years later, she left Qingshi Village and came to Xiuzhuang, the county town, to make a living. Little did she know that the little fox had already transformed into a human and was silently guarding her as Gu Yunxin. When the Qingqiu Fox Clan was in civil strife and Fox King Qingli's murderous intention came, He Ying held on to the wooden hairpin that contained half of his life's cultivation and broke into the Hell Fire Cave alone despite being eight months pregnant. She fought against the Fox King as a mortal, risked her life to save her husband and gave birth to twins. In the end, her heart was broken and her soul was gone. Gu Yunxun held on for ten years and finally let go when the black ice was about to melt. He spent his whole life with her in his dream and moved on with love and memory. This is a story about protection, sacrifice and letting go, gentle and tragic.