Scott is an unassuming guy muddling through his dull life. He is oblivious to the demon threat until he is forcibly transported to a demon dimension. Baffled and disoriented, he manages to fight his way back to the human realm where he is met by a group of people tracking the demons. As the only human to defeat a demon in its realm, the trackers are eager to learn how Scott survived.
They also need his help acquiring an ancient artifact called the Cuspis Belial. A mysterious demon is willing to trade for it. He divulges that two competing demon lords are trying to advance in the demon hierarchy. Their strength is drawn from the souls they control, and the quickest way to augment their power is to abduct humans.
With the help of Daniel, an outcast angel with an affinity for the human hippie subculture, Scott learns the Cuspis Belial can transport humans to the demon realms. Daniel understands the demons. Scott can fight them. And armed with the artifact, they have the means to take the battle to the enemy.
Scott must find the demons behind the attacks. Once he does, he’ll have to confront them to stop the raiding parties. And he’s got to do it quick, because the demon offensive is escalating.
This is as low energy as they come given you want to imply action and peril but you've got the form right. Now just polish this up so it has some zip.
Right now it's a snore. You don't need exclamation marks. You need punchier verbs.