This is my first year keeping bees and I was only able to start with one hive. If seemed to have been fending well. Had honey stores going into winter. Well, yesterday I discovered a completely empty hive. The only thing that remained was about 5 or 10 dead bees. The comb was completely clean except one frame that had a very small number of larva and some capped drone brood. I don't imagine the larva or capped brood is even alive due to no nurse bees. Any ideas what happened or what I did wrong. Oh, and the comb that contained the honey appears to have been chewed by the bees if that helps with a prognosis.