Where do I come from? For some, the question has a simple answer -- for others, the truth can be much more complicated. With the rise in popularity of at-home DNA tests, it's now easier than ever for people to uncover their family history and, sometimes, things their parents wish would stay buried. Interested in learning more about his family heritage, director Jon Baime took an at-home DNA test and uncovered a family secret that has been hidden for half a century. Featuring in-depth interviews with Jon's siblings as well as a treasure trove of family photos and films spanning 70 years, FILLING IN THE BLANKS takes audiences on a journey as Jon explores the meaning behind his discovery and expands on what it means to be family.