Ghost of Ice Valley

A girl, Stephania Azen, lives deep in the Russian tundra with her little sister in the middle of a 3rd world war. With 50% of the world ravaged by the conflict, she must do everything to protect her little sister from joining in the carnage. But her little sister becomes sickly, a condition of unknown origin permeated within her that will kill her soon. Now she has to find that cure, and she must face significant threats to save her little sister. No sacrifice is too great... No life is too valuable to take in the name of her sister's health.