A meteor crashes onto the Trinity nuclear test site and a man rises from the crater. A shockwave is released and a few selected individuals are knocked unconscious. The man turns out to be the devil. The people hit by the shockwave are strangers who become angels with special individual powers tasked with stopping the rise of the four horsemen and the Apocalypse.
This CW traffics in the Biblical Apocalypse although it may be sacrilegious to turn angels into X-Men. Some of it is simplifying. I'm willing to root for the show which has a couple of familiar faces. It's not until the devil do something more complex and the Angel of Death reveal that the show gets better. It's too little too late as the show gets cancelled after 13 episodes. There is another problem with the story telling since the four horsemen are always expected to rise. If they don't rise, there is no show. It's trying to be a battle but some parts of the outcome are never in doubt. That keeps the tension at a lower level. Overall, it's a good enough, but not great show.