Post PD, Ghost's attacks are decreasing (not non-existent, but far fewer and less destructive). Sam, Tucker and even the A listers are curious about the reason for this.
The thing is, the attacks have lessened, but now, when they do appear, they're being a different kind of weird. Especially around Danny.
Danny, for his part, doesn't notice anything too unusual. Are they weird? It seems that after Pariah Dark they had a looooong discussion, and some misunderstandings (like the fact that he's a ghost baby and that when going through the portal, they're basically passing through his grave without permission) were cleared up, therefore things got better.
This makes perfect sense to Danny.
His friends think there's something else at stake.
Basically: Danny has become prince/king of the Ghost Zone, and is being secretly trained to be the king, just that it's a secret only to Danny since no one made it clear and Danny never notice because he thinks he's just doing some favors for (granpa!) clockwork or playing with Cujo and the rest of the Rogues, and who wouldn't want to learn from Frostbite about the ghost version of first aid and such? Or training with Pandora who is as cool as Wonder Woman? Nocturne, after all the spectacle, now admire the space with him and even gives him a mantle with stars and everything. And if he sees a strange ghost every now and then who teaches random facts about the Infinit Realms (such as its creation and how the dimension works), well, they are very interesting stories ok?
Also: for some reason, the entire class, minus Danny, is taken to some random place in the Zone. Sam, Tucker and Val having to take charge of the situation to get the class back safely. Danny, discovering this, goes in search of them. What can happen until Danny finds them?
