En brokig skara individer med superkrafter samlas ihop av den hemliga organisationen S.H.I.E.L.D. för att skydda planeten mot invaderande styrkor från yttre rymden. Tillsammans bildar de motvilliga superhjältarna gruppen The Avengers.
Efter att ha blivit bedömd som olämplig för militärtjänst, anmäler sig Steve Rogers till ett topphemligt forskningsprojekt som förvandlar honom till supersoldaten Captain America. Därmed inleder han kampen mot den onda organisationen Hydra.
Steve Rogers, alias Captain America, lever ett lugnt liv i staden Washington och försöker anpassa sig till den moderna världen. När yrkesmördare försöker döda honom får han hjälp av Black Widow och så småningom Falcon. De inser att de står mot en ny fiende som kallas Winter Soldier.
Agent Coulson stops at a convenience store and deals with a coincidental robbery during his visit.
An artist, Steve Rogers, is nearly murdered by spies, looking for his late father's national secrets. He is saved during surgery when a secret formula is injected into him; this serum not only heals him but also gives him fantastic strength and lightning reflexes. To help him solve the mystery behind his father’s murder and bring those guilty to justice, a government agency equips him with a special motorcycle loaded with gadgets and an indestructible shield. Now armed, he battles against the nation's enemies as the Sentinel of Liberty, Captain America.
The realm of magic is being threatened by the realm of logic, so Carolinus, the green wizard decides to shield it for all time. Ommadon, the evil red wizard, stands in his way. Carolinus then calls for a quest that is to be led by a man named Peter Dickinson, who is the first man of both the realms of science and magic. It is Peter's job to defeat Ommadon.
In the days of King Henry IV, stalwart young Myles and his sister Meg have been raised as peasants, without any knowledge of who their father really was. But one day, they journey to Macworth Castle. There, Myles falls in love with Lady Anne Macworth, makes friends and enemies, and learns to be a knight.