Serial Killer in the City

A serial killer has been murdering people in Kureta City. Commander Ariadne Nightsbridge has allowed the party to help with the investigation.
After following some clues, the party discovered the murderer to be the half-elf Safana Grey. The woman managed to flee, but Ariadne has entrusted the knights to make sure she does not escape the city.
Safana's body has been found in an abandoned temple of Mortona, deep within the Deddo Forest. Carved into her head was the word 'FAILURE'. A 'speak with dead' spell revealed that Safana was promised eternal beauty and youth by somebody she referred to as 'The Wicked One'.