The final reincarnation has begun. In her first life, she was a lady from an official family and lived a comfortable life. But is her identity really just what it seems? She was so forward-thinking that she actually became a sister with a forensic doctor who came from time-travel. When she was 12 years old, her peaceful life was broken, and murder cases appeared one after another. As smart and meticulous as she was, she worked with her sisters to solve problems. But who knows, all of this is just a conspiracy. . . . . . (Volume 1)