Welcome to a world where Tony Stark never built an Iron Man armor. Where Thor is a hard-drinking atheist who hates hammers. Where Wakanda is dismissed as a myth. And where Captain America was never found in the ice. Instead this world has always been protected by Earth's Mightiest Heroes, the Squadron Supreme of America. And now the Squadron faces an attack from some of their fiercest enemies, like Dr. Juggernaut, the Black Skull, the Silver Witch and Thanos with his Infinity Rings.