---Like the other quest guides, there will be two types of guides, a partial one and full one.
1) Head to Lima, if you don't know where that is, check here.
2) Look for the quest book. It might take some time. The book is on a table in a room next to a big room full of red skeletons..
3) Ok, now you need to look for the guy's friend. Look around again for any signs of people, or their remains at least...
4) Yikes, looks like you found him. Well, it says now to find the author of the note. He's probably in Underleaf.
5) The guy wants you to find his brother now. You know he's in Plymoth, so it shouldn't be very hard to find him. If you take the portal from Binxonia to Plymoth, he shouldn't be very far away.
6) Someone stole the armour, eh? Well he already gave you a clue, that the villain is south of Plymoth. I suggest follow the shoreline all the way down, and the villain should be close to a Death Knight.
7) Almost done! Just take the armour to you-know-who. Very easy, and the reward is nice.
8) Enjoy your Slate Breast Plate.
1) Head off to Lima. You can get directions here.
2) Now, you'll need to find the quest book. Check the above map for directions.
3) After you've gotten the quest book, you'll need to find the guy, which is now dead. Go find his bones, which is also located on the above map.
4) Ok, now that you've found his remains, you'll need to find the author of the note. Go back to Underleaf, and enter the bank. Talk to Sir Marcus, the guy wearing white.
5) Now you need to find the guy's brother, who is in Plymoth Wharf. Head back to Binxonia, and take the portal to Plymoth.
6) The portal should've taken you to in front of the Plymoth bank. Enter, and talk to the guy in this room.
7) Time to kill someone. Go find the Dark Knight. If you don't know where he is, check here.
8) Once you've killed the Dark Knight, go talk to Jobe the Blacksmith in Binxonia, and collect your reward.