Meet the twins, Kristine Ellaine has diagnosed by mental illness called Antisocial Personality Disorder, because she loves killing people, just to aim a justice. She hates to be involve in many people. She thinks that those people are bad and wearing a good mask, to hide their secrets and bad odors. Layunin ni Kristine na protektahan ang mga taong mahal nito sa buhay. Samantalang si Kristal Ellise ay isang mabait at maintindihin at masayahing tao, talikwas ito sa kanyang kakambal na kasing tapang ng mababangis na hayop. Hinahayaan lamang ni Kristal na bullyhin siya ng mga kaklase at kaibigan nito, hindi siya lumalaban. "Hindi lahat ng mabuti ay mabait, maraming masamang tao na nakagawa ng mabuti para sa iba." "Magiingat kayo sa mga introverted, their silence can kill you."