You are now inside of a crypt that is full of skeletons. Now, you must go back to the tomb and open the door. Regardless of whether you solved this confrontation peacefully or you killed the woman, you will get the key. Break the curse by using Bless spell and then speak with her. The person that is important to you is called Quanna. Inside of it you can find petrified people. The key can be found in another tomb which is guarded by a dog. Sadly, the door that lead to it are closed.
The item is located in Johanna Surrey's Tomb in Stonegarden. Speak with him and he will ask you to retrieve a mysterious artifact.