The Rapture has occurred, just as the Bible predicted. The faithful have risen up to Heaven. Those left behind are in a living hell.
Earth burns, hell-like in its oppressive heat. Every volcano in the world has erupted, and tsunamis and earthquakes continue to devastate the planet. Clouds continually rain ash onto the scorched landscape, sparking fires all around. Plants and animals are dying. Food is scarce. The night sky is devoid of stars, and the moon - when it can be seen - is the colour of blood.
The remnants of humanity fight for survival. Most have fled the cities and now hide in caves deep in the mountains. By night, demons stalk the Earth, capturing the remaining humans and killing them - if they're lucky. The less fortunate are converted to worship of the Devil, and ushered into endless hell.
Eighteen year old Sam is unable to rise up because he is half demon. Hikari, a Japanese sword master and demon expert and his beautiful daughter, Aimi, have been all the family Sam has ever known. Now they're gone, and Sam must set out on the mission Hikari charged him with long ago: to help all the humans left behind. Armed only with his beloved Japanese swords and his wits, Sam wanders the post-apocalyptic world alone, separated forever from everyone he loves. Cursed by his demonic heritage, he must now embark on a quest that will take him across the US to the City of Angels.
There he will confront his destiny. There he must fight to save a friend... and the souls of the living.