It begins with Man Thing in Florida protecting the nexus and about to attack a man investigating the portal. When he attacks the man is set aflame and it turns out it's Johnny, he's there investigating the portal alongside Sky. They discuss her being here, the potential of the portals and things like that.
The next scene is what we saw in the preview, Sue and Reed holding a press conference while Val has figured out how to control the Forever Gate. She uses to find the Prince from the first issue, finds out his culture is polyamorous (so he has multiple consorts that he loves equally) and runs home crying to Franklin.

NOW THIS PART IS BIG. Franklin gets the device from Val and plans to use the Forever Gate to got to Krakoa. Suddenly, Xavier mentally contacts him and reveals that Franklin is not a mutant and never was a mutant. As a kid he accidently used his cosmic powers to give himself the X-gene - so he is not welcome on Krakoa.

Late, Alex and Julie Powers parents and Onome's father have come to the FF for their missing kids. The FF decide to use the Forever Gate to bring them back and now the Future Foundation are back!
Also, Lyja's back which leads to a big fight with Johnny and his "soulmate" Sky. But they are not the only ones coming through the gate... Countless aliens pour through the gate but are not aggressive or invading, it is revealed that they are all beings that Franklin created while the team were rebuilding the multiverse. The reason why they are copming to earth is that they are escaping the threat from the first issue of this run - The Griever!