Business at Mrs. Lee's store takes a hit when the hotel opens a new boutique. Zoe decides to enter the Park soapbox race emblazoned in the store's colors to help advertise Mrs. Lee's shop! But racing against her arch-rival Samantha, Zoe and Lassie have their work cut out for them.
Thanks to Lassie, the children avoid a landslide on the hill overlooking the visitor center. Looking down they realize the building has been damaged. With the center now closed for safety reasons, Beth has no choice but take new work away from the park.
Zoe, Harvey and Lassie try to stop Samantha and Nick exploring an old gold mine whose access has been re-opened following an earthquake. Zoe and Lassie end up trapped with Samantha at the bottom of the mine.
Thanks to Lassie, the children avoid a landslide on the hill overlooking the visitor center. Looking down they realize the building has been damaged. With the center now closed for safety reasons, Beth has no choice but take new work away from the park.
Zoe's beloved aunt Kim is passing through the valley and surprises Zoe by taking her camping with Harvey and Lassie.
When Graham informs Sarah that the bat colony living in the gulch is behaving strangely, Zoe, Harvey and Lassie set out on a recon mission to find out why. Sarah also joins the kids and as they climb down into the depths of the gulch, Sarah has to face her biggest fear.
Graham has to take the helicopter out to search for a reckless snowboarder in danger and, because Graham has promised to spend the afternoon with his daughter, Zoe and Lassie set out with him. While the rescue mission is not what she is expected of the afternoon, Zoe discovers her inner sense of duty, like a true ranger.
When a mysterious epidemic breaks out in the park, Zoe is determined to find out what has caused it so that Lassie and other animals don't fall ill. Zoe soon loses patience with Harvey's scientific approach and his insistence on seeking out proof.
Impatient to see her friend Judith again, who has left the valley several years hence, Zoe reminisces about their intrepid adventures in the Park. But their reunion takes an unexpected turn for Zoe when she discovers her friend is now confined to a wheelchair.
Zoe decides to pursue the family tradition by winning the Park's legendary blueberry pie competition. To achieve this she has to bring a special personal touch to the family's award-winning recipe. But when Samantha arrives with the recipe by a top-chef in hand, Zoe begins to doubt she has the ability to find her own special twist to make her pie the best.