My Grandpa's Garage is a sentimental biopic about one man's life as a collector of cherished items held under the roof of his beloved A-frame garage. Unbeknownst to him, his journey throughout life collecting items and capturing moments through the lens of a camera made him a documentarian of history. The garage becomes a "museum" that reflects the embodiment of seizing life through material objects.

Narrated by his granddaughter, Adrienne Wagner, this story about Bob Wagner is told from the perspective of Adrienne as she recalls how her memories and lessons playing in the garage as a child have helped her grow into who she is today. As Bob introduces the items, they come to life before our eyes and teach us that it isn't the object itself we should cherish, but the memories that are held within them.