Into the abyss

"He wasn't even sure if it was a conscious decision but he found himself sliding into a small tunnel on his hands and knees and crawling faster than he ever had before, towards his impending doom. When he emerged he had to step back to avoid falling directly of a huge precipice. He looked back once more to see a few guard crawling through after him before throwing himself off the cliff and into Tartarus."

After the Trials of Apollo when Jason dies we follow Jason, Annabeth, and Percy as well as some of my OCs in part 2