Deep within Russia, would-renowned scientist Pyotor Shapirov lies in a coma. Locked within his brain rests the key to the greatest scientific advance in the world's history. Only one scientist can hope to locate this secret—Dr. Albert Jonas Morrison, an American. Morrison's mission: to be miniaturized to molecular size along with a team of four Soviet scientists, travel in a specially designed submarine to the dying Shapirov's brain, and tap the secrets held there. Morrison and his companions have only twelve hours to accomplish their task—in the face of unexpected terrors and with their own lives hanging precariously in the balance.