The farce concerns the ultimate fate of the gem called the Penultimate Night, and the identity of the mysterious man who absconded with a certain detective's long-lost body. For what purpose does M pursue the Penultimate Night?
That route opened up once the 
water level went down in the moat.
فُتِح ذاك الممرّ بعد انخفاض
منسوب الماء في الخندق
Comme l’eau des douves
s’est évacuée,
Il percorso si è aperto
Essa rota se abriu assim que o
nível da água baixou no fosso...
Этот путь открылся для них,
как только обмелел ров.