For most, Orpheus is a mystery, a scoundrel who tells everyone and everything to go to hell and does only what he wants. And now this unpredictable man has joined the ranks of the immortal guardians, elite warriors charged with protecting the world of men, whether they like it or not. Orpheus has only one thing on his mind: to save his brother from the underworld. He did not expect that a woman would interfere with him, especially such a beauty as Skyla, a siren. Orpheus does not know that she is an assassin sent by Zeus to seduce, capture and destroy this guardian. However, it is Skyla who may suffer the most. For some reason, Orpheus seems familiar to her, and her body yearns for his caresses. Perhaps he is not who he seems... The truth may shed light on a deadly secret, as ancient as the immortal guardians themselves.