Priestess Ring

The is received from the Farmer. Speak with him about his wife and you'll receive 20. Next speak to the Farmer's Son. After that talk to Miller, then to Clotho. Return back to the Farmer and choose either to buy the from him for  or dig up his wife's body and steal the ring off it.

If you choose to dig up the body, you'll require an exhumation permission. Once you get it head to the Wheat Farm and dig up the body. You can then take the body to your Morgue and perform an autopsy to remove the from the body.