Ludovoix tries to make you go away until he realizes that he can make use of you to search for the missing knight that he sent on patrol.
This quest is available if you have completed the quest Cold Reception.
Starting the Quest
Talk to Ludovoix in the Observatorium in Coerthas Central Highlands to begin the quest.
Search for the Missing Knight
Go west to the small orange circle marked on the map. You will find a purple circle around a Keeled-over Knight. Enter the circle and two Hooded Assaulters will attack. First, defeat the one with the lance, then defeat the one with the sword and shield.
Afterward, check on the Keeled-over Knight.
Report to Ludovoix
Go east to the Observatorium and talk to Ludovoix.
Speak with Edmelle
Go slightly east to find some stairs to the south. Go up the stairs and turn left, and enter the tall building. Talk to Edmelle.
Speak with Forlemort
Go up the spiral staircase until you find Forlemort. Talk to him to complete the quest. There will be a cutscene.
Next Main Scenario Quest
After you complete the quest, talk to Jocea to accept the next quest: Men of Honor.