Ling Shuang and her sworn younger brother, Ye Ze, investigate the cause of their parents' deaths. One becomes an assassin, the other a secret agent, and they investigate separately. When an assassin organization clashes with the secret agents, Ling Shuang takes her own life to protect her brother, Ye Ze. Unexpectedly, she transmigrates to another world, where her body has become that of a girl. She struggles to survive in a world with both supernatural abilities and zombies, meets all kinds of people, and uncovers the final conspiracy. (This is a long novel. Please be patient as you read.)