Fear Itself: Sin's Past

In this single-issue 2011 Marvel comic, writer Mark Gruenwald and artist Al Milgrom explore the shadowy history of Sin, the daughter of the villain Red Skull. Originally published as part of the Fear Itself event, the story delves into her formative years and the brutal training that shaped her into a formidable agent of evil. It offers a focused, character-driven look at one of Captain America's most persistent foes.