Tier 1: This is a tricky one. Your clue is, “On the tip of the pyramid, your path shall be revealed.”
If you look on your map, you can find an area called “Pyramid Point” at the southern shore. Down there, look for a “tip” jutting out into the water, where you can find the side-mission “Message-in-a-bottle.”
Tier 2: When you stand in the right place, Madame will call you and give another cryptic clue. Just like last time, look at your map – near Norma Creed’s house is the Wisp Wood. Visit there for your next clue.
In the Wisp Wood, look for a pumpkin match amidst a huge old tree. Stand in the tree’s shadow for your next clue.
Tier 3: You’re looking for flowers and the buzzing of bees. This one is simple, just return to the Agartha Portal in Kingsmouth. Don’t actually go through it, just stand near to unlock another clue.
Tier 4: This one is easy, just go to the statue behind the church, in the graveyard.
Tier 5: Head up north to Langmore Bridge and enter from the road. You’ll be instructed to cross.
Tier 6: As you cross, a ghost will attack. Defeat it, and you’ll finish this investigation mission.