Jennie had an illness no one could cure and Chaeyoung invented a cure to save her and shared it with the world but not knowing the side effects and consequences of her invention. Chaeyoung encountered a creature that was not from their world and lead her to her death. Jennie promised herself she would avenge Chaeyoung and the creature that killed her will pay the price only to find and realize her plan would change when she finally caught the one who killed Chaeyoung. Also posted on aff (lalalini)