A drug courier crashes his plane in a frozen lake in Yosemite's high country. Winston, a Yosemite "valley rat" on the run from killers in his home town, discovers the plane during a winter hike. He off loads the cargo and begins a new life as a drug dealer. After he and his girlfriend are murdered during a drug deal gone south, their two unrelated children, Josh and Kathy, are raised by their respective grandparents. When Josh asks his Uncle Mark for help in finding his "sister," the outcome is anything but predictable.