Order of Elohim: Book 1 "All Hallow's Eve"

In the mortal realm, there exists a day where demons of all kind breach the veil. It is up to the ancient order of Elohim to seal this breach every all hallow's eve. But what happens when a hormonal teenage boy becomes a part of the team. Will they seal the breach this time? Will a forbidden romance get in the way? Will Satan win this time?