From the information they extracted from the captured demon—how Marlene managed to force him to talk was anyone's guess—they learned that he didn't know what the slaves were being used for. His only task was to deliver them to the underground chambers of the castle.
How many demons lived in that place? Even that question went unanswered. So, while the captured demon's information was limited, it did at least guide them to their destination this time.
The caravan of carriages rolled onto the castle grounds, the wheels crunching over the gravel path as they passed through an eerie landscape. On either side of the road, rows of weathered tombstones jutted from the earth like jagged teeth.