On November 22, 1963, Libby Gallant was in downtown Dallas, hoping to catch a glipse of President John F. Kennedy. But instead of jumping for joy, she trembled with fear while she watched him die. Hours later, after several versions of the horrifying murder played out on TV, she realized that she had recorded more footage than anyone else. And as she fought her way through an immense panic attack, she decided to hide her home movie from the authorities. But what if, many years later, someone finds the hidden film? And what if the contents are so damaging, that the government needs to destroy it or history would have to be rewritten?