The monsters are stirring. Ancient creatures that haven't been seen for millennia are rising out of the abyss to attack the demigods. But something else has risen, too. Ezra, the son of Nyx, is the most powerful demigod of all time, being the son of one of the most ancient primordial gods. Join him on his adventures, as he defends Camp Half-Blood from the monstrous menace.

Pitch Black has returned, and he's got an ally by his side. Mim, however, has other plans. A new Guardian has risen, and he's got power to rival Jack Frost. Will this fiery new Guardian be able to stop Pitch, or will his light be snuffed out by Pitch's evil?