The book opens with a flashback to the beginning of the Illuminati. Panther doesn't agree with the idea of a secret group that can't trust friends or family.
Now. Mr. Fantastic talks about how everything dies.
26 hours earlier. Wakanda
Some Wakanda subjects have found an obelisk with a hologram representation of the planets floating around it. Black Panther shows up and explains exactly where these planets are...light years away. A rhino pops out of a portal and they dodge it. Panther goes into the portal and ends up on some red skied version of Earth. He see's figures floating down from a giant planet that fills the sky and is closer than the moon.
There's a special ops team with a woman who calls herself Black Swan. She speaks High Sumerian. There's also a man with her. She has her ops team kill 2 of Panther's men. She tells Panther she's named Black Swan and she came here to kill a world. There's a battle, she kills the man that was with her. She calls some tool she holds "the wheel" and seemingly blows up the planet in the sky before Panther can stop her.
The next day. Captain America, Dr. Strange, Mr. Fantastic, Tony Stark, Namor and Black Bolt have flown in to speak to Panther.