War has been declared on Earth by the Black Order...and the Avengers Alliance is the planet's only hope for survival! A Chitauri invasion means the core team is going to need reinforcements! Nova, Ms. Marvel, and Squirrel Girl join the fray—with a special appearance by the Guardians of the Galaxy! But will they be enough to stave off the invasions? It's all hands on deck for the Avengers Alliance as they combat a powerful new threat in the Redwood Forest. The battle for Earth reaches a critical stage in this epic adventure bridging the story between the smash hit mobile game Marvel: Avengers Alliance and the upcoming Marvel: Avengers Alliance 2!