When a group of super-powered kids discover that they've been secretly training under Hydra to be villains instead of heroes, they break out and seek the help of the Avengers to bring down their evil overlords. Makoto, Chloe, and Adi struggle to convince their friend Bruno to also escape Hydra Island. But Bruno's loyalty might already be too deep-seeded in Hydra.

The Avengers lay siege to Hydra Island. While Thor, Captain America, Hulk, and Wasp battle Red Skull, Iron Man and Makoto infiltrate the base to find Chloe and Adi. Makoto manages to rescue Chloe and Adi, but it's still unclear where Bruno's true loyalty lies.

The Avengers, along with Makoto, are tasked with transporting the Red Skull to the Raft prison. But along the way, they are attacked by the mysterious Winter Soldier who also wants to capture Red Skull. Makoto tries to prove himself to the Avengers and get answers about his origins and powers.

Bored with hanging around Avengers Tower, Makoto, Chloe, and Adi sneak into the city to try and become heroes on their own. Meanwhile, Ares, the God of War, attacks Avengers Tower, which is defended only by Iron Man and the Hulk.

Thor takes Makoto, Chloe, and Adi on a visit to K'un Lun, where they meet the Immortal Iron Fist. Iron Fist agrees to train the kids in martial arts but Makoto is frustrated by the seeminly-pointless training exercises. Meanwhile, Thor receives a cryptic warning from the K'un Lun Elders about a dangerous looming threat, which only the Future Avengers may be able to stop.

Iron Man is forced to confront the mistakes of his past when the son of the villain Iron Monger returns to avenge his father and destroy Tony Stark once and for all. Adi grapples with the crimes he committed while under Hydra's control, unsure whether his past makes him unworthy of being a hero.