In Cellphone, a high-concept thriller, friends Farren and Wynne go on a hike. They come across a very peculiar cellphone. It's stuck in camera mode. However, they can't view what's currently in front of them, but rather can only see what appears to be disturbing images from their future. Carefree and adventurous Farren wants to get to the bottom of this, while cautious Wynne would rather leave the cellphone and get out of there. As the girls explore further, the images get more horrific and even become a matter of life and death.