The Bell Beneath Blackwater
The Bell Beneath Blackwater
Read aloud
A bell has rung from beneath the harbor, though no bell has hung there for a century. Since then, the tide has brought back wreckage from ships that sank before anyone in town was born. Mara Venn offers payment to discover what is calling from below before the next high tide.
Run the session
Cheat sheet
Objectives
- 1Discover what caused the bell to ring beneath the harbor.
- 2Find the chapel and assess the danger below the reef.
- 3Prevent the next answering ring and settle the shield’s fate.
- 4Keep Rusk’s salvage crew from creating a second crisis.Optional
The clock
The next high tide arrives after the party’s investigation, approximately six to eight hours after the opening scene. If desired, advance it whenever the party suffers a major delay or rests.
Scenes
- 0:00A Note Through the Floor
- 0:35The Survivor’s Account
- 1:20A Claim in the Spray
- 2:10The Road Under the Reef
- 2:55The Answering Bell
Cast
- Mara VennQuestgiver
- Brother EdrinAlly
- Captain Sella RuskAntagonist
- Tovin PellWitness
The hook
Set the scene
Begin in the Breakwater Archive as a deep, unmistakable bell note travels through the floorboards. A jar of seawater on Mara Venn’s desk ripples in concentric circles, though the room is still. Mara tells the party about the latest salvage crew and asks them to investigate before the tide turns.
How Mara Venn asks
Mara Venn summons the party to the Breakwater Archive after hearing of their recent work.
She offers a modest advance, access to town records, and the harbor authority’s permission to investigate the seawall and submerged sites.
Rumours
Scenes
about 4 hours0:00
35 min
socialThe table is here
1. A Note Through the Floor
The cramped Breakwater Archive, stacked with tide charts, ship manifests, and salt-stained ledgers.
The party meets Mara, hears the bell, and receives the job. Let them ask questions and choose whether to begin with witnesses, records, or the shoreline.
NextMara directs the party to Tovin, the surviving diver, and provides a chart marking the last known salvage route.
0:35
45 min
social
2. The Survivor’s Account
The archive reading room and the sheltered dock where Tovin is recovering.
The party gathers testimony and compares it with records. Tovin describes the chapel and Rusk’s interest in the shield; the archive records show the bell’s appearances align with high tide.
NextA fresh bell note draws attention to the seawall, where Rusk’s crew is seen approaching the reef route.
1:20
50 min
combat
3. A Claim in the Spray
The slick seawall, where spray, ropes, and the rising tide make movement hazardous.
Rusk’s crew confronts the party while trying to reach their salvage boat. The party can fight, negotiate, or pursue them across the seawall.
The Seawall AmbushNextAny surviving crew or recovered chart points toward a submerged chapel beyond the outer reef.
2:10
45 min
exploration
4. The Road Under the Reef
A narrow reef passage revealed at low tide, leading to a stone stair hidden beneath the water.
The party navigates the reef approach, identifies a safe entry window, and decides how to manage limited air, climbing gear, or other setting-appropriate resources.
NextThe passage opens into the bell chamber as the tide begins to rise.
2:55
70 min
combat
5. The Answering Bell
The submerged chapel, with the bell’s rope leading down into dark water and the shield’s resting place nearby.
The party confronts the sentinel and the rising-water hazard, then chooses how to silence or secure the bell and what to do with the shield.
The Drowned Bell ChamberNextOnce the bell is quiet, the party returns to the harbor to report, bargain over the shield, and face the consequences of their choices.
Behind it
What people believe
A bell of unknown origin has begun ringing beneath the harbor at Blackwater.
The sound coincides with strange tides and the return of debris from old wrecks. Keeper Mara Venn seeks help investigating a recent salvage expedition and finding the source before the next high tide.
Background
The Cthulhu Shield is a custom, ancient relic: a round shield of dark green metal, its face worked into overlapping scales around a central, closed eye.
It does not grant its bearer knowledge or control over the sea. Instead, when raised against a supernatural force, it can briefly turn that force aside, while carrying the sound of distant waves into the bearer’s dreams. Its original maker and full capabilities are unknown.
The stakes
If the bell’s call continues, something beneath the reef may answer more forcefully, wrecking harbor vessels and endangering the town.
The Cthulhu Shield can help resist the threat, but misuse may worsen the danger.
Encounters
2The Seawall Ambush
Combat
A narrow stone seawall beside a churning harbor, with slick steps, mooring ropes, and gaps where waves wash over the path.
Foes
Two to four reef-touched salvage hands
One brinebound diver
ComplicationA rising tide slowly removes safe footing. If the party spends too long fighting, the flooded route may force a retreat or a risky alternate exit.
ScalingFor a small or inexperienced party, use two salvage hands and make the brinebound diver withdraw after taking a serious setback. For a large or experienced party, add two salvage hands and let the diver use the flooded ground to break line of sight.
The Drowned Bell Chamber
Combat or hazard
A half-submerged stone chapel beneath the reef, with a tilted bell, broken pews, narrow arches, and a central platform just above the waterline.
Foes
One reef-woken sentinel
One echoing presence, represented by a supernatural hazard rather than a required physical opponent
ComplicationThe submerged chapel’s bell chamber is filling with water. Loud noises cause loose masonry to fall, while the shield can deflect one supernatural surge but draws attention when it does.
ScalingFor a small party, the sentinel is slow and can be diverted by sound. For a large or experienced party, add a second sentinel or make the rising water divide the group. Keep the hazard avoidable through clever use of the chamber.
Cast
4Mara Venn
QuestgiverQuestgiver, keeper of the Breakwater Archive
WantsWants the drowned bell silenced before panic empties the town and endangers the search crews.
“The bell rang once from beneath the water. I need you to find out why before the next tide.”
Brother Edrin
Ally, caretaker of the coastal shrine
WantsWants to protect the locals and keep the shield away from anyone tempted to use it as a weapon.
“It was not a warning. It was a reply. We should not ask the sea another question.”
Captain Sella Rusk
Antagonist, leader of a salvage crew
WantsBelieves the shield can contain the presence beneath the reef, and will seize it if the party refuses.
“Give me the shield, and I can keep the thing below from reaching the harbor.”
Tovin Pell
Witness, sole survivor of the latest salvage dive
WantsWants someone to believe their account and prevent another expedition from entering the submerged chapel.
“The water took my shadow first. Then it started answering in my mother’s voice.”
How it ends
Rewards
Items
A waterproof lantern and a coil of fine salvage line
A sealed archive folio containing a hand-drawn chart of the reef
The Cthulhu Shield, if the party claims it. Custom item: once per adventure, the bearer may use it to turn aside one supernatural attack or effect, at the GM’s discretion. Afterward, the bearer hears distant surf in dreams until the next rest or suitable cleansing.
On a win
The party interrupts the bell’s call before the next high tide.
The harbor settles, and Mara records the events in the archive. The Cthulhu Shield remains a source of uneasy questions: the party may leave it with Mara, give it to Edrin for safekeeping, keep it, or negotiate another arrangement.
What it leaves open
If it fails
- If the party cannot establish what is causing the bell, fear spreads through the harbor before the next high tide.
- The town evacuates its waterfront, local trade stops, and Mara loses access to the archive until the party can restore trust.
- If the party loses the shield to Rusk or abandons the chapel, the salvage captain attempts to claim the relic.
- The shield remains with Rusk, who may use it to lure the presence toward the harbor in a later adventure.
- If the bell rings three times before the party resolves the crisis, the submerged presence answers with a surge that strikes the harbor.
- The presence reaches the outer harbor. The immediate threat can still be addressed later, but several boats and the breakwater are damaged.
Complications (d6)
- 1A sudden squall cuts visibility to a few paces and forces anyone traveling along the seawall to secure themselves against the spray.
- 2A panicked dockworker claims the party brought the curse to town and tries to rouse a crowd against them.
- 3The drowned bell rings while the party is near open water; each character hears a different voice calling them by name.
- 4Captain Rusk’s crew reaches the next site first and removes a key tool or piece of evidence, leaving a clear trail toward their boat.
- 5The tide rises sooner than expected, flooding the lowest passage and cutting off the party’s planned return route.
- 6The shield grows cold and vibrates near a supernatural threat, startling nearby locals and revealing that the party carries it.
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