Akumu no hatsuyume - S1.E20

Lowry takes Fiona and Benedict to another room to inquire about Ikstova's secret treasure, and meanwhile Emma, one of the royal bodyguards, escapes and goes to Treize's nearby cabin to inform him about the situation. While Fiona and Benedict buy time in the hopes that someone will come to save them, Treize and Lillia go through an underground tunnel and reach an underground storehouse nearby to the cabin where Fiona and everyone else is being held.