When Tony Stark's Iron Man armor gets damaged in a battle with the villain Mandarin, Tony must find a way to fix the suit and fight back.

Candace has always known that her brothers are a little weird, especially Ferb, who never seems to talk. But after watching an all-night science-fiction movie marathon, she's convinced that Ferb is actually an alien! Can Candace prove her brother is really from another planet?

When the television show, "Let's All Dance Until We're Sick" comes to Danville, Candace signs up with Jeremy as her partner, but Jeremy is nervous that he is not a good dancer and enlists the help of Phineas and Ferb.

Phineas and Ferb build a "Perry translator" so they can finally understand what Perry the Platypus is saying.

Conflict arises when the merciless Kree and the Skrulls go to war, placing the Earth in danger as it waits for help from Captain Mar-Vell and the Avengers.