First, Collect and read the two letters from the Gorhart Cemetery so you can take the mission
Speak to Gizela and learn about her worries
Travel to Didenhil and there inside the Three Lamps Inn you will find her wounded husband
Talk to Camden and with a successful Persuasion check convince him to return home (With the Persuasion skill at level 4 there is an almost 100% chance of success, but it also may be done done at level 3)
If the Persuasion fails he will decide to stay at the Inn and never return to his wife, the reward from Gizelda being of lower quality
Return to Gizela, who will most likely be found in the cemetery for a reward.