Screen Gems has released the first trailer for the adaptation of Cassandra Clare‘s young adult novel The Mortal Instruments: City of Bones. The story follows Clary Fray (Lily Collins), a teenage girl who discovers that she’s descended from a sect of half-angel warriors who protect the world from demons. As a teen drama with ties to the occult, The Mortal Instruments will draw comparisons to Twilight. But the trailer—specifically the sword fights and flamethrowers within— suggest more ass-kicking. There is a big world and dense mythology here to explore, and the visuals help sell it better than the synopsis ever could. It helps when you have Mad Men‘s eloquent Jared Harris to deliver the exposition in what sure looks like the “Giles” role.
Jamie Campbell Bower, Jonathan Rhys Meyers, Lena Headey, Kevin Durand, CCH Pounder, and Kevin Zegers also star. Directed by Harald Zwart (The Karate Kid), The Mortal Instruments: City of Bones opens August 23, 2013. Watch the trailer after the jump.