It’s 1666 - apparently the year of the original Satanic panic?  We finally get to meet THE Sarah Fier and when we do, we learn some shocking truths about her.  The little settlement of Union is stricken with a heavy dose of rot and decay because of a dark deal with the Devil.  But who is truly responsible?  "Goode is evil" as we go even further back in the timeline and discover exactly where Shadyside’s misfortune began before heading back to '94 to bring it all to an end in Fear Street Part III: 1666!