Sometime Promises Have to be Broken

Percy Jackson thought he knew what pain was, after all, he's been through more than any other demigod in history. However, nothing could ever have prepared him for Tartarus, where everything wants to kill him, and can. Down here, it's kill or be killed, torture or be tortured. Will Percy be able to make it out, and even if he can, will he ever be the same again?

Or: What if Percy fell into Tartarus alone?

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