After My Sister Jumped from the 28Th Floor

The day my sister jumped from the building, I flew back from Norway. She left me with a debt of 2.4 Billion and a chip that couldn't be opened. At the funeral, her boyfriend's ring mark was fresh. A man named Shen Que said, "I'll help you, but you have to help me investigate my uncle's death." After searching, I discovered that my sister's death was related to another fall from a high height forty years ago. The murderer is staring at me.