Hellhound gone demigod

Being the reincarnation of Gaea's favorite mortal has its perks. Sally Jackson formerly known as Elizabeth Johnson, gave birth to Poseidon's child. Zeus's spies notify the king of the gods that Poseidon has broken his oath. Being the asshole drama king that he is, he sends his lightning to kill sally and her child.

Sally had been told of what Zeus would do in a vision from Gaea. She flees to place percy under Gaea's protection as a secret guardian. But something causes the plan to be messed up resulting in the death of sally Jackson and the disappearance of her demigod son