In the poorest town named Baylon, two young twins are chosen by God to fight in an unknown battle against evil spirits from Hell.
Phoenix Toby, being in the spirit, becomes the Pray'n Mantis; the only one whom God will use to fight His final battle against the Serpent Beast.
The Serpent Beast is a prisoner released from Hell by Him for a season to roam the world among humans.
Joseph Toby, in spirit, is also known as the Black Manicon.
It is his job to work side by side with the Pray'n Mantis.