Post-Avengers

After the Battle of New York, Tony Stark inherits the last survivor of a Chitauri bioweapon program—a newborn alien who imprints on him—and discovers that saving the world is easier than raising something that refuses to let him go.

When Tony Stark accidentally orphans an alien dragon during the Battle of New York, he becomes the unwilling guardian of a Chitauri war-beast hatchling that could either save Earth or destroy it from within.