The Fantastic Four journey to Attilan and assist the Royal Family in restoring Black Bolt to the throne, but must contend with Black Bolt's treacherous brother Maximus and the swarms of Inhumans loyal to him.
Earth's environment runs haywire as Ego, the Living Planet, a unique monstrous planetoid creature that devours planets just like Galactus, enters the solar system. To repel it, the Fantastic Four join forces with the mighty Thor.
Just as Johnny falls in love with the similarly-powered Frankie Raye, Galactus returns to Earth. This time, repelling Galactus will require the aid of Ghost Rider and Thor, plus a very personal sacrifice.
The Fantastic Four help Black Bolt save his people - the Inhumans - who live imprisoned under an unbreakable dome guarded by a simple, but relentless robotic sentry, who misunderstood his orders to protect the Inhumans forever.