Percy, Annabeth, Luke, Thalia, Hazel, Nico, Bianca, Frank, Jason, and Leo were teleported into a room
 [Thalia being brought back from the dead, and Nico and Bianca from the Lotus Hotel]
This takes place before they met eachother
Percy doesn't know he's a demigod yet
Annabeth has been living in camp with Luke
Thalia had been dead
Nico and Bianca don't remember anything from their past
Hazel has been brought back from the dead
This was before Frank's mom died
Leo is an orphan and is freaking out