Identical twins retain a unique material from early development deep within their brain stems. When this material is removed from each twin and combined, it produces a powerful neurological restorative for other identical twins. In a non-twin, the material induces a euphoric "super high" and greatly increases mental acuity. For the wealthy there is a black market for these substances. Removal of the material is fatal to the original set of twins. Everything comes at a price.
—William R. Vitanyi, Jr.