Hey Akundaera,
This quest chain normally begins with The Dark Lady Calls, as long as you have completed The King’s Death and The Return of Derek Proudmoore. This quest chain is also integrated in the War Campaign.
Note that Game Masters are not able to provide in-depth quest assistance over a support ticket, which is why you will often receive a Wowhead link for additional information. In these situations using the Wowhead Quest Completion Tracker can also help you find your missing quests.