Resetting Lady

She was reincarnated in a book. Her life would be complete if she could discover her true love. When the story came to an end, however, whatever reasons she had dealt with all ended with the same situation, her death. She had lived as Carynne for more than a century with the life circle repeated as being poisoned, strangled, died of sickness, being crushed to death, died then gaining life again in so many ways that she was sick and tired of this recurrent humdrum life.

What should she do this time? 

Something she had never done before. As a way of celebrating her 117th birthday, Carynne decided to become a killer.