Marvel's iconic heroes and villains are on display in a superstylized animated series, as they battle one another for possession of the Infinity Sword, the most powerful object in the universe. A confrontation between Iron Man and Dr. Doom shatters the sword and spreads its fragments around the globe; if Doom and his minions recover the shards, life as it is known in Super Hero City will never be the same. Luckily, the city has the best heroes around, and Iron Man calls on Wolverine, the Hulk, the Silver Surfer, Thor and a hotshot flyer named the Falcon to step up and keep Doom in his rightful place.