Akin to a visual journal entry, Things Long Left Unsaid is a short personal documentary about the sudden loss of the filmmaker's father and her coming to terms with all of the things the two never talked about, including the difficulty of existing as a Black family in her predominantly white suburban hometown.

By juxtaposing her family's archival home videos with present day black and white footage, Antonia Thornton takes audiences through an authentic journey of grief and acceptance.