Ranger Graham Parker and his wife, Dr. Sarah Parker keep order and care for the animals in a sprawling Grand Mountain National Park, their 10-year-old daughter Zoe, her best friend Harvey, and the loyal and heroic collie Lassie fill their days with adventure. From facing down a backcountry brush fire to reaching out to some of the characters who live in the park's countless canyons, for Lassie and Zoe each day brings new, exciting and sometimes dangerous challenges. Played against its monumental backdrop, it tells the most enduring story of all, the power and depth of the love that a young girl feels for a very special dog and how that amazing animal returns that affection. An animated update of the classic series by Eric Knight, that brought Lassie into the 21st century.