Radio Silence(2014)

What stops a father and son from being able to talk? As far back as I can remember, my dad and I haven't been able to communicate to each other very well. I know hardly anything about him, except that he likes jazz music and fiddling with old radios in the garage. In an attempt to find out why my dad and I don't talk, I look at the life of a man I know absolutely nothing about - My dad's father.