It is a documentary about a choir of senior citizens (the average age is 80) from Massachusetts. They have traveled the world doing shows. They sing rock songs from The Talking Heads, The Clash and James Brown to name a few.
I laughed and I cried. My favorite part was when a former choir member who left after having a heart attack, returned and sang "Fix You" from Coldplay at one of their shows. I bawled my eyes out. He reminded me a lot of my dad.
Do yourself a favor and rent it.
I can't get the trailer to load here on the blog, but you can go here and watch it.