Percy Jackson, age 18, thought that after the Second War with Gaea thought that his life couldn't get worse... But of course, Leo invents time travel. After Annabeth hears this she is both excited and extremely worried, why in my lifetime. Leo and Jason were both extremely excited, they wanted to go the next day. Then there was the others, Nico, Hazel, Will, Piper, Frank, and Reyna, they were somehow sucked into this mess... and it was a very big mess.
The main 10 characters and some other are owned by Rick Riordan, some characters such as Finnick, Mags, Haymitch, Effie, Snow, etc. are owned by Suzanne Collins, and some characters are owned by me.