Dear Zachary: A Letter to a Son About His Father: In 2001, Andrew Bagby, then an utterly 28-year-old doctor, was found dead in a park in Pennsylvania. He was shot by his ex-girlfriend, who fled to Canada, where she is free on bail and currently expecting Andrew's son. Andrew's furious parents fight for custody of the child and to convict their son’s murderer. Filmmaker Kurt Kuenne combines this story with home movies and interviews with those who knew Andrew, hoping to give his best friend's son a chance to learn who his father was.