羅恩惠原計劃拍攝關於六七暴動少年犯嘅紀錄片，蒐集資料嗰時發覺六七暴動檔案啲正本冚嘭冷運咗返英國，保存喺英國國家檔案館，而香港歷史檔案館嘅影印件竟然幾乎全部消失，只剩低21秒嘅影像。羅恩惠因為噉使咗4年時間蒐集資料拍攝《消失的檔案》。
Lo had planned to shoot a documentary about the juvenile delinquents of the June 7 Riots, but when he was collecting information, he found that the original copy of the June 7 Riots archives had been transported back to United Kingdom and preserved in the National Archives of United Kingdom, while the copies of the Hong Kong Public Archives had almost disappeared, leaving only a 21-second video. Because of this, Luo Enhui spent 4 years collecting information and filming "The Vanishing Archive".