Hansel's Defiance

AU Sequel to "The Major's Asylum". One dark and stormy night, a man by the alias of Hansel comes to Sherlock for help in freeing his sister from captivity in his father's ex-lover/female psychopath's "simulated fairytale", and to solve the murder of his mother by the same woman. When Sherlock and John go to Finland, they find this woman, and she tells them a secret darker than hers