Warner Bros. has released the trailer for the drama If I Stay [ISTAY] based on the Young Adult novel by Gayle Forman. Chloe Grace Moretz [CMORE] stars as a 17-year-old budding cellist who's experiencing first love with a young guitarist when a car accident kills her entire family and puts her in an out-of-body experience while she's in a coma. Stuck in limbo, she must decide whether to fight to stay alive to struggle through life's tragedy, or let go and pass on into the afterlife. If I Stay hits theaters on August 22nd.