A picture. A single image reminding you of someone or something you've lost, something you don't want to live without. You can't seem to move on, to accept life has changed, to live again. You're trapped in the picture, in the past.

Maybe this was a lost family member or friend, maybe this was a sickness that isn't going away, maybe this was sinking into depression. But you can't help but remember how life was before, how life after will never be the same, and can't help but feel that nothing in the future will be able to fill the hole the past left.