There's nothing worse than putting together a puzzle and having one piece left that you can't fill in. That's how it feels when a good friend in your life is gone, for any reason and for any amount of time. This card is a great way to let them know how just how much you miss them. Showing a puzzle with one piece still waiting to be placed, blue sky and clouds behind it, and your thoughtful words above, they'll know for sure that you'd love nothing more than to see and talk to them once again.