Your story is a world.
Build it like one!

Plotheus is the structured world-layer for authors. Track every character, relationship, and chapter state so your drafts never contradict themselves. Write with confidence, whether solo or with AI assistance.

See How It Works
Plotheus · The Epic of Gilgamesh
B
I
H1
H2
{ }
Ch.8 Sc.2
Gilgamesh stood atop the great walls of Uruk, gazing east toward the Cedar Forest. The memory of Enkidu weighed heavy on his heart, his friend, his equal, now gone.
Gilgamesh
Character
Title
King of Uruk
Nature
Two-thirds divine
Bond
Brotherhood with Enkidu
Enkidu· brotherhood
rulesbrotherhoodrejected byjourneyed tofell inGilgameshUrukEnkiduIshtarCedar Forest
Gilgamesh
Connections
Enkidu, Uruk, Ishtar, Cedar Forest
World context snapshot
Copy
Characters in Scene
Gilgamesh
King of Uruk · Two-thirds divine
→ Brotherhood with Enkidu (deceased)
→ Arc: grief → quest for immortality
Scene: Ch.8, Sc.2: "The Departure"
Location: Uruk, city walls
Present: Gilgamesh (alone)
Previous: Enkidu's death (Ch.7)
World State
✓ Humbaba defeated (Ch.5)
✓ Enkidu deceased (Ch.7)
✓ Cedar Forest conquered
Tag characters, places, and events right in your prose

How It Works

From blank page to structured world in minutes

1
Create a story workspace
Choose a structure preset (Book, Memoir, Screenplay, Game Narrative, and more) or start from scratch. Plotheus sets up a hierarchy tailored to your format.
2
Build your world
Define your world's building blocks (Characters, Places, Events, Items) with custom fields. Each type becomes a reusable template.
3
Populate and connect
Create instances and connect them with rich, typed relationships. Containment, alliances, conflicts: all structured and searchable.
4
Check continuity at any chapter
When you're writing Chapter 12, Plotheus gathers every character, relationship, and event up to that point into a single view. Instantly see what your world looks like at any moment in your narrative.
5
Export or share your world
Export your prose and world data in multiple formats. Share read-only links with beta readers or editors. And if you use AI writing tools, copy your world context to give them the full picture.

Free to get started.

Start building your world at no cost. Plotheus helps you organize, visualize, and maintain your story world. If you use AI writing tools, your structured data makes the perfect context — but Plotheus stands on its own.

Learn how it works→

Who It's For

Writers of every kind

First-time novelists
Pick a template and start writing. Plotheus gives you a ready-made structure and guides you through building your world step by step.
Experienced authors
Full control over your world's structure. Define exactly what you need to track: character traits, location details, relationship dynamics, your way.
Series & serial writers
Keep your story consistent across hundreds of chapters. Your world graph always knows the latest state of every character and relationship.
Memoir & nonfiction writers
Organize the people, places, and events from your life into a structured timeline. Perfect for memoirs, biographies, and creative nonfiction.
TTRPG & worldbuilders
Map factions, locations, NPCs, and lore into an interconnected graph. Keep your world internally consistent whether you run sessions or build settings.

FAQ

Frequently asked questions

Absolutely. Plotheus is a powerful story organization tool on its own. The world graph, relationship tracking, and structured hierarchy work whether or not you ever connect to an AI.

Most AI memory tools store your story as machine-readable chunks you can't read or edit, and they only work with the specific AI they were built for. Switch tools and you start over. Plotheus keeps your world as structured, human-readable data you fully own. Swap between ChatGPT, Claude, Gemini, or any other AI freely. And because your world stays readable, you can actually explore and edit it yourself, not hope an automated search finds what matters.

Plotheus combines Plot + Prometheus. In Greek myth, Prometheus brought fire to humanity. Plotheus brings that same clarity to your narrative: a structured, illuminated view of your story world that keeps every detail consistent across chapters.

Ready to architect your story?

Start organizing your story's world today. Create a free account and bring structure, continuity, and clarity to your writing.