Thoughts Of Evil-Greek Mythology-Demigods

2 children named Chris and Angel were born and soon abandoned by their mother and there father which was a unknown god.
Chris and Angel are turning 15 and preparing for the danger in their life once their foster parent Christopher releases them into the world by themselves he can no longer help them it is up to them to find their destiny of who there father is and what power is inside Chris, while a new evil arrives from the evil spirits of there underworld.