Laura Parton falls asleep on an airplane trip to an undisclosed location. After being awakened by a tone over the PA system and speaking with a fellow passenger named David, terrorists take control of the plane. David reveals himself to be an FBI special agent and tries to stop them, but a meteorite strikes the plane, sending it crashing into the Canadian wilderness.

After a series of bad dreams, Laura wakes in a small cabin where Kimberly Fox, a poet and songwriter, has been caring for her. Kimberly says ten days have passed since the crash, though she only found Laura two days earlier, leaving an unexplained eight-day gap. Their brief safety ends when a surviving hijacker transforms into a plant-like monster.

Laura later heads into the wilderness to look for survivors and a way to contact the outside world. She finds that other strange creatures are appearing in the area, and that crash survivors are mutating into the same monsters. Her search leads her to an abandoned mining facility, where she must look for Jannie, a lost little girl Kimberly had found with Laura and one of the plane’s former passengers.