 | This quest has a quick guide found here. It briefly summarises the steps needed to complete the quest.
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Details
| Start point |  Talk to Edmond, living next to the wall surrounding East Ardougne, north of the castle.
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| Official difficulty | Novice |
| Description | The western part of Ardougne has been shut off as a deadly plague sweeps through the people. However, a young woman who went in to try to help those stricken by the illness has disappeared and her parents have become worried. |
| Length | Short |
| Requirements | None |
| Items required |
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| Enemies to defeat | None |
Walkthrough
Gathering the items
Edmond's house.
Dwellberries spawn in McGrubor's Wood west of Seers' Village. You can get in by squeezing through a loose railing on the north side, or you can get the berries via Telegrab. Additionally, you can buy dwellberries from Heckel Funch in the Tree Gnome Stronghold on the 1st floor[?] of the Grand Tree on the east side or even grow them yourself with level 36 Farming.
- Rope can easily be bought in the general store in Ardougne for 24 coins, or from Ned in Draynor Village for 18. It also spawns in the Karamja general store.
- Elena's picture can be found in Edmond's house. It's on a table.
- A bucket and a water source can be found behind Edmond's house.
- Milk can be obtained by using a bucket on a dairy cow. There are dairy cows on a farm near the north entrance to Ardougne, southeast of the sheep and east of the wheat.
- The fastest way to obtain the chocolate dust is to buy a chocolate bar from a baker in East Ardougne and grind it with a pestle and mortar or cut it with a knife. Chocolate bars can also be bought from Heckel Funch on the 1st floor[?] of the Tree Gnome Stronghold, as well as in Yanille and Port Sarim. The bakers in Ardougne also sell chocolate bars.
- Snape grass is most easily obtained on the small peninsula behind the Crafting Guild. Alternatively, you can buy snape grass from Nightmare Zone for 175 reward points, or from the Grand Exchange for 56 coins.
Starting the quest
Items required: Dwellberries, 4 buckets of water, a spade, 
Elena's picture and a rope.
Talking to Edmond.
Once you talk to 
Edmond, he'll tell you to talk to his wife about getting some sort of protection against the plague. His wife, 
Alrena, is just inside the house (or wandering outside), and she'll tell you she can make a 
gas mask if you get her some 
dwellberries. Give her the berries, and she'll give you a mask. If you need a spare, there will be one in the cupboard. Also, make sure you take the picture of Elena from inside the house while you're there.
Talk to Edmond again, and he'll tell you about his plan to dig under the wall and get into 
West Ardougne. First, you'll need to soften the ground. Use your 
buckets of water on the mud patch behind his house (between the cabbages potatoes). You can use one bucket, but you'll have to keep refilling it with the sink inside. Then use the 
spade on the softened ground.
Pulling the grate.
You'll fall under and find Edmond there as well. Walk south, and you'll find a pipe blocked by bars. After pulling it to no avail, just use a 
rope on the pipe, and talk to Edmond to pull the grate off. Put on your gas mask and climb inside to go into West Ardougne.
Finding Elena
Items required: Elena's picture.
NPC locations.
Once inside West Ardougne, talk to 
Jethick. He's standing a few paces to the east. Show him 
Elena's picture. He'll tell you to go check the Rehnison house and give you a book that he borrowed from them. Head north and a little west (see picture) to find the house sitting right up against the edge of the wall. They'll let you in when you mention you have the book. Once inside, talk to 
Martha or 
Ted Rehnison, and then go upstairs and talk to the daughter of the household, 
Milli, who'll tell you more about Elena's whereabouts.
Head back out of the house and south of the town square to find the house the girl told you about. You'll recognise it because of a big black "X" on the doors. Attempt to open the doors; the 
Mourners won't let you in because it's been hit hard by the plague. Tell them that you're looking for a kidnapped girl, and they'll tell you you need permission from 
Bravek to enter the house.
Getting inside
Items required: A bucket of milk, chocolate dust and snape grass.
Talking to Bravek.
Go back to the town square and go into the large building just north of the manhole. Ask the clerk, who is through the door, then tell him you're there for something very important (Say, "This is urgent though!"), and he'll let you inside to see Bravek. He can hardly talk to you, though, as he's badly hung over. He'll give you a tatty piece of paper with a recipe for a 
hangover cure. To make it, put the 
chocolate dust into the 
bucket of milk, and add 
snape grass. Give the concoction to him (be sure to use the snape grass on the chocolatey milk or else you'll drink it), and tell him that the mourners won't listen to you. After, he'll give you a 
warrant that grants the permission you need to go search for Elena in the plague house.
Rescuing Elena.
Head back to the house, and try to enter again. The Mourners will try to stop you, but when given the warrant from Bravek they'll be rather at a loss, giving you a chance to sneak inside. Once inside, search the barrel to the [?]west of the staircase to find 
a small key. Elena is downstairs. Go downstairs and unlock the door with the key you just found, and release the grateful girl.
Head back to the manhole and talk to Edmond to finish the quest. You can then get back outside using the mud pile on the east wall of the sewer.
Rewards
- 1 Quest point
- 2,425 Mining experience
- A magic scroll, letting you use the Ardougne Teleport if your Magic level is 51 or above. After you read it, you'll memorise the spell. Usage of an Ardougne teletab also requires the completion of this quest.
Required for completing
Completion of Plague City is required for the following:
