A meteorite crashes into the serene wilderness of a national park. In its aftermath, both people and animals succumb to aggressive behavior followed by death. Two rookies, FBI agent Beth Hartley and Park Ranger Mike Bauer, are put together to investigate the strange events.
Beth is tough as they come on the outside but vulnerable on the inside. After her last breakup, she has given up on men to focus on her career. Mike, a former military police officer, has developed trust issues and prefers his new career where he has no partner that he needs to rely on.
As their investigation brings them closer to the truth, they find themselves getting closer to each other. In a dangerous forest where every animal is a potential threat, and even the air could be toxic, their best chance for survival is a partner they can trust.