Vampire Horror Mystery for Monster of the Week

Blood theft.
Neck wounds.
A Valentine’s Day deadline.

Something ancient has moved into town, and it’s building a nest.

A Valentine’s Day Vampire Mystery Gone Wrong

On the eve of Valentine’s Day, the hunters receive a quiet request from a hospital nurse who knows better than to panic.

Blood is disappearing from secured storage.
One donor’s blood is being targeted every time she gives.
And violent attacks in the local park suggest the creature responsible is no longer feeding discreetly.

What starts as an investigation into stolen blood becomes a race against time to stop an Arch Vampire whose plans are driven by grief, obsession, and the belief that love should last forever, even if it has to be taken by force.

Ancient Vampires. Modern City. No Happy Endings.

My Bloody Valentine is a gothic urban-fantasy horror adventure where players must uncover the truth behind a vampire nest before its master completes a ritual of blood, devotion, and possession.

At the heart of the mystery is:

• An immortal vampire hiding in a secluded gothic estate

• A hospital staff member magically compelled to steal blood

• A surgeon whose blood resists vampiric control

• A predator preparing to turn Valentine’s Day into a massacre

Fail to act in time, and the town becomes feeding grounds.

Designed for Monster of the Week

This mystery is built specifically for Monster of the Week, using its investigation structure, countdown clock, and escalating threats—but it can be easily adapted to other modern supernatural RPGs.

The adventure supports:

• 2–6 players plus a Keeper

• One long session or two standard sessions

• Heavy investigation with flexible clue placement

• A cinematic final confrontation

Key Features

• A complete vampire-focused horror mystery

• Investigation hubs including a hospital, blood bank, suburban home, and paranormal-filled manor

• A dynamic Countdown that escalates toward town-wide devastation

• Illusion-based manor mechanics designed to split and isolate hunters

• Fully written NPCs with personal stakes and supernatural secrets

• Detailed vampire lore, weaknesses, and methods of destruction

• Safety tools and content guidance for horror play

Horror Themes & Content Notes

This adventure explores dark subject matter common to vampire horror, including:

• Blood loss and blood drinking

• Obsession and stalking

• Mind control and thrall mechanics

• Kidnapping and loss of autonomy

Keepers are encouraged to adjust intensity and use safety tools to match their table.

A Tragic Monster, Not a Mindless One

The central antagonist is not a random killer, but a centuries-old creature driven by loss, rage, and longing. His obsession turns affection into terror, and his love story threatens to end an entire town.

Stopping him means more than fighting claws and fangs, it means understanding what he’s become.

Perfect For Fans Of

Vampire horror • Gothic mansions • Urban fantasy mysteries • Tragic villains • Supernatural investigation • Dark Valentine’s Day game.