Indomitable

Camp Half Blood is in danger once again. An unknown infiltrator has slain Peleus, guardian of the Golden Fleece. The Fleece has fallen into Tartarus. The Camp and demigods put everything onto the line to survive.
The son of Hades is ridden with misery.
The son of Nyx has a quest.
Someone is trying to escape hell.
This is the story of demigods trying to save what they love.