At the bottom of an icy lake in a cold village in the north, Xing Mei, an alien observer who has run out of energy, has been sleeping for a hundred years. In a desperate situation, she merges with the DNA of Ruan Shuchen, an educated youth who went to the countryside to save a child from drowning. She wakes up with her own identity. The high-tech medical system that comes with her becomes her vitality and also becomes the bond between her and the male protagonist Shen Yanzhi.
Ruan Shuchen was originally a daughter of a family of scientific researchers. Her parents were criticized and imprisoned in a cowshed. She took her younger brother Ruan Zhiyu to the countryside to make a living, but died trying to save someone. After the fusion, Xingmei downplayed human emotions and only had a trace of concern for his younger brother. His superior medical ability was noticed by the army commander Shen Yanzhi. In order to improve the medical level of the army, the two entered into a contract marriage.
After entering the army, Ruan Shuchen relied on his interstellar medical knowledge to develop a variety of advanced medical methods and used his military exploits to rehabilitate his parents. Under the protection of Shen Yanzhi, the companionship of her younger brother Ruan Zhiyu, and the experience of the army, she faded away from her indifference, slowly realized family, friendship and love, gradually gained full human emotions, and truly fell in love with Shen Yanzhi, who had always protected her.
From an emotionless alien to a caring human being; from contract marriage to two-way love, Ruan Shuchen used the power of the stars to redeem others and complete his own emotional redemption in the torrent of time.
