Time to share

When Sarah Hart decides to make a quilt depicting her favorite view from Mount Greylock, she hikes there with her granddaughters, a sketchbook, and a camera. The girls videotape each other at the top of the hill, and later, Sarah notices something odd in their footage: a man, barely visible through the bushes, struggling with something on the ground. Who is he? What was he doing there? Sarah returns to the spot and finds an old cellar full of stolen items.