This phrase is a form of Winston Churchill's quotation, made in a radio broadcast in October 1939:
"I cannot forecast to you the action of Russia. It is a riddle, wrapped in a mystery, inside an enigma; but perhaps there is a key. That key is Russian national interest."
So, there is a field puzzle or Cryptex (instead of a riddle) in the container which is a Lock-n-Lock. It is wrapped in a short story which is a mystery. Both are tied up with the key. The log is inside the Cryptex. Please return everything as you found it or the Cryptex wrapped in the story and tied gently with the shrouds.