Six young criminals break into hidden catacombs and attempt to steal jewels, but some inhabitants are guarding the precious belongings. After being trapped in this dark maze of crypts, the group tries to escape alive.

High-level demons collect low-level demons as warriors in attempt to obtain a key containing the blood of Christ. The key is guarded by immortal warriors called Demon Knights.

After freeing a young Bedouin girl from her unjust imprisonment in Jerusalem, Phryne Fisher begins to unravel a decade-old mystery concerning priceless emeralds, ancient curses and the truth behind the suspicious disappearance of Shirin's forgotten tribe.