A mysterious group of beings known as the Builders have set their sights on Earth, intending to "cleanse" it as part of their cosmic agenda.

In response, Iron Man, Captain America, Thor, Hulk, Black Widow, and Hawkeye come together as the Avengers, assembling their forces to confront this extraterrestrial menace. They are joined by other heroes like Captain Marvel and Spider-Man, as well as cosmic entities like Ex Nihilo and Abyss, who play crucial roles in the unfolding conflict.

The Avengers face overwhelming odds as they battle the Builders across different fronts, both on Earth and in deep space. Their mission not only tests their strength and teamwork but also challenges their beliefs about the universe and their place in it. As the story unfolds, alliances are forged, sacrifices are made, and the fate of the Earth hangs in the balance as the Avengers strive to protect humanity from annihilation.

---