Andie and her twin brother Tony are quad biking in the woods near their family cabin when they notice the sky has turned a sickly shade of green. Moments later the sky erupts into a raucous thunderstorm and they're forced to take cover. When the sky becomes eerily calm their way home is blocked by a massive funnel cloud. The twins dodge falling trees only to face a bigger dilemma is it safer to keep moving or to seek refuge in less than ideal cover