Cordy was only a mortal girl, minding her own business in the world when they came. Ugly, horrible monsters they were, and she could see every one of them. When a few people her age showed up and told her it was all real, she thought they were crazy, too. But the more she heard the more she believed. Maybe the Greek myths were real after all. Maybe she would fit in somewhere. But being the only mortal at Camp Half-Blood was a hard job, even if she could see through the "mist". And when she realises who she really is inside, her world may come crashing down.