Have you already interacted with an object at 3,2 in wolf den dungeon? There should be an object that you can interacts with it to process an event.
Yes, in grid map at wolf den dungeon. There should be a question mark at a block which located at 4 down and 3 right (set the top-left as a starter point). And please make sure you explore this dungeon in a right time too. I'm barely remember this but I think you must explore in by daytime.
BTW sorry for my poor English skill, English is not my first language and I don't know how to explain it well.
I just check it up and it just a dialogue to process a next step of this event. You need to interact with '?' mark in wolf den by daytime after you already talk to Logan about trouble in den. After you interacted with '?' mark in wolf den , you just need to process a next step. I'm quite sure that this step of an event doesn't need any requirement except time.
Sorry to ask you more question but are you sure that you never seen this '!' mark before? Because after you talk to Logan (in T! logan route) there should be this mark appear on the map to interact with. I think this event did not require anything to trigger.
Have you try to explore in Dark swamp? I think you should try it several time. Sorry if it couldn't help much.