Captain Britain is a highly anticipated Marvel Cinematic Universe (MCU) film that introduces Brian Braddock (Henry Cavill), a British superhero chosen to protect Earth-616 as part of the Captain Britain Corps. The story follows Brian as he receives the Amulet of Right from the sorcerer Merlyn, granting him superhuman strength, speed, flight, and mystical energy manipulation. Set in 1972, the film explores Brian’s journey to uncover the truth behind his brother’s death, orchestrated by the sadistic puzzle master Arcade (Rupert Grint). Alongside his sister, Elizabeth Braddock (Jenna Coleman), Brian must navigate a world of espionage, magic, and multiversal threats to restore balance and protect the British Isles.

The film also introduces the villain Joshua Stragg, a.k.a. The Reaver, a tech-enhanced warlord who seeks to harness ancient magical artifacts, including the Sword of Might, to gain unstoppable power. The Reaver’s attacks on London force Brian to confront his inexperience and rise as the true protector of Britain.