We're really not sure what to make of the new YA movie adaptation Mortal Instruments. On one hand, it's got an interesting premise. On the other hand, if we see another movie or book about an underground magic world with a chosen one kid who will save us all, we may stab our eyes out with forks.

Mortal Instruments: City of Bones is based off the YA series by Cassandra Clare. Here's the official movie synopsis:

In the series’ first book, the #1 New York Times bestseller “The Mortal Instruments: City of Bones,” set in contemporary New York City, a seemingly ordinary teenager, Clary Fray, discovers she is the descendant of a line of Shadowhunters, a secret cadre of young half-angel warriors locked in an ancient battle to protect our world from demons. After the disappearance of her mother, Clary must join forces with a group of Shadowhunters, who introduce her to a dangerous alternate New York called Downworld, filled with demons, warlocks, vampires, werewolves and other deadly creatures.

Mortal Instruments: City of Bones hits theaters on August 23rd, 2013.