Shadow Nox was a living contradiction. She was a Daughter of Boreas, blessed by Hecate, yet her name literally meant darkness. Pale blonde hair that shone keenly but light grey eyes that could cut through an ocean.

Yet one thing remained defined about her. If you were just anyone and pushed too hard to be let in all you would find were corners and edges sharp enough to slice through bone.

But, then she disappeared at the same time as one of Camp Half-Blood's  most celebrated heroes. Percy Jackson.

Nico do Angelo is her best friend and he is the only one who has any idea what had happened to her. But, as much as he yearns to help the girl he likes, he can't do a thing.