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The Black Water Below Harrowmill - AI-generated fantasy Quest

The Black Water Below Harrowmill

The Black Water Below Harrowmill
Workshop · Quests
Investigation

The Black Water Below Harrowmill

Lvl 3-53-5One 3 to 5 hour session· Medium

“Someone poisoned the town's water, but the stain in the cistern is older than any sabotage.”

— Hook · Investigation

M
QuestgiverMayor Elsin Vale
Investigation
D&D 5E
Medium
Lvl 3-5
3-5
One 3 to 5 hour session
4 NPCs
2 encounters
The Opening

“The town well has turned black, and one of the dockworkers who investigated it has not come back. The mayor begs for quiet answers before the council shutters the cistern and the market collapses. Find what is poisoning Harrowmill's water before the next dawn draw.”

— Hook · Investigation

Set the Scene

At dusk, the mayor escorts the party to a courtyard well where the water gleams dark as ink. A bucket rises with a smell of rust and wet stone, and a trembling apprentice swears he heard singing from beneath the grate after the first splash hit the floor.

Patron
M
Questgiver

Mayor Elsin Vale

The mayor requests discreet help and offers access to sealed records, a guide, and a modest purse if the party keeps the matter quiet.

On the Streets · In the Books

Rumours

d4 · table
  1. 01
    The black water started after the night crew repaired a cracked valve in the east tunnel.
  2. 02
    A singer was heard under the well the same night the dockworker vanished.
  3. 03
    Sister Merrow refuses to go below the shrine stairs, saying the bells ring on their own.
  4. 04
    The old cistern was once fed by offerings dropped through a stone mouth in the floor.
Stakes

If the party fails, Harrowmill loses its water, its trust, and possibly its hold on the river trade. If they succeed, they expose a deeper history under the town and decide whether the old shrine remains buried or returns to relevance.

Ticking Clock·By dawn, the council will seal the cistern, arrest a suspect, and begin rationing the wells unless the party brings proof or a cure.

Background Lore

The riverside town of Harrowmill has grown wealthy on shipping grain, timber, and lamp oil, but its prosperity now depends on a stone cistern under the old shrine quarter. For three nights the town wells have run bitter and black, livestock have refused to drink, and one dockworker vanished after hearing singing below the flood tunnels. Old miners insist the shrine quarter was built over something older than the town itself.

What the World Knows

A town's water supply has been poisoned, and the party must investigate the cistern, trace the contamination, and stop whoever is sabotaging Harrowmill before panic shuts the settlement down.

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