Throughout Marvel, DC, Image, Dynamite, or even Zenscope there have been countless different stories told. Each one with it's own unique twists and grabs. What is the one story though that regardless of prefered publisher, character, or creative team that everyone calling themselves a comic book fan, should know a little something about. They don't have to know exact details of the story, but they know the summary of what happend. Share your opinion of what the 'One Story" is in a small paragraph explaining why every comic fan should know this stoy. For an example I will start:
Batman: The Killing Joke
The Killing Joke is probably one of the best Batman vs Joker stories I have ever read. This one story changed a lot about the Batman mythos. Most particularly it changed how the Joker was depicted, and served as a sort of an inspiration for many incarnations we see of the Joker today. In this story we see Barbara Gordon (aka Batgirl) receive her crippling injury that ends her career as a costumed crimefighter (which was recently changed), but rise up from it in future stories afterward. We also see a very chilling origin story which seems to make somewhat sense of the Joker's insanity, but goes a step further at revealing a very disturbing insight at the relationship between the Joker and Batman. For what this one story does for Batman is why this is one story that every comic fan should know about.