This is the tenth year since Zhang Qiling's return. This is a story about seeking breakthroughs in the past mysteries that have been constantly cut and confused. The innocent memory, the return of the oil bottle, the secret of the fat man, the new characters on the stage, lead to new puzzles, follow the clues, and find the meaning of survival. (The style of the original work is slightly beautiful, the main part is exploration, and the second part is puzzle solving.)