When giant monsters known as Leviathons start raining from the sky and wreaking havoc all over the world, it is up to the heroes of Earth to stop them. But even working together, the Avengers, Champions, X-Men, Guardians of the Galaxy and Inhumans might be up against a threat too large for them to tackle. Wave after wave of Leviathons attack, intent on razing the world, and it seems like only a miracle can save Earth now...