Ironheart, AKA Riri Williams (voiced by Sofia Wylie), who is having difficulty adjusting to college life as the youngest student there then the college's engineering lab is demolished by an alien and kidnaps her best friend. Inspired by Iron Man, she develops a plan to save her friend. The special will also feature appearances by Iron Man (voiced by Mick Wingert) and a new character named A.M.I. (voiced by Melanie Minichino).

When a threat no one could have expected bears down on the Marvel Universe, this ragtag, untrained band of teens have no choice but to rise together and prove to the world that sometimes the difference between a 'hero' and 'misfit' is just in the name.

K.C. Cooper, a high school math whiz and karate black-belt, learns that her parents are spies when they recruit her to join them in the secret government agency, The Organization. While she now has the latest spy gadgets at her disposal, K.C. has a lot to learn about being a spy, including keeping her new gig a secret from her best friend Marisa. Together, K.C. and her parents, Craig and Kira, and her younger siblings, Ernie and Judy (a humanoid robot), try to balance everyday family life while on undercover missions, near and far, to save the world.

When an evil spirit known as Pitch lays down the gauntlet to take over the world, the immortal Guardians must join forces for the first time to protect the hopes, beliefs and imagination of children all over the world.