The first day Song Qinghuan was admitted back to the wealthy family, she found that she had become a "substitute daughter" - her best friend Qin Xuewei was the real daughter, but due to a terminal illness, Song Qinghuan needed a "blood bag" to survive. When Song Qinghuan's "rich family transfer system" popped up the first task: "Replace Qin Xuewei as the sole heir of the family, reward: life-sustaining pill", she was in a dilemma. Behind her best friend's tenderness and thoughtfulness are murderous intentions, her adoptive parents' hypocrisy hides a terrifying conspiracy, and every task the system completes is eroding her moral bottom line. When Song Qinghuan found out that she was not the daughter of the Song family at all, but a kidnapped bloodline of the Qin family, a secret war about identity, power and revenge broke out. She must complete system tasks within a hundred days to save her life, and each task takes her further and further away from her former self - until she discovers that the person standing behind the system is the Qin Xuewei she thought was dead.
