NASA scientist Tom Reynolds thought everything would be fine when he moved to Seattle to be with his fiancé, Navy Lieutenant Emma Peterson. But when his gearhead son Wyatt can't stop fighting with her green-minded daughter Chloe, they realize that this new family may not make it. And things aren't just stormy on the home front; when an unidentified object is shot down by the military and crashes into Puget Sound, it sets off a series of strange weather phenomena: earthquakes, tornados, lightning storms... and they're spreading. Now, this new family must find a way to work together to save the city, and each other, before it's too late.