Fraternal Nightmares

Twins. Bonded by birth, joined by separation. This is the story of extraordinary twins, a brother and sister, bonded by a rare genetic anomaly they only intuitively know about, struggling to retain their emotional bonds despite the efforts of entities and personalities outside and within them trying to separate them. Can a permanent change forced upon them in very early adolescence quell the demons in one of them? Or will it take a profoundly disturbing physical and psychological event that happens to them soon after finding each other again, and the patience and brilliance of one caring psychiatrist to finally bring them together as one, and exorcise the demons within them? Is it applied science or unconditional love that heals them?