Plan a One-Shot Tabletop RPG Session for New Players

You have a group who have never played and they are curious but cautious. The first session has one job: make them want to come back. Too much world-building and they are lost. Too little structure and it collapses. This designs a one-shot matched to your system and session length, with a ready-to-run opening, three scenes that each do something different, and an ending that works whatever happens.

<context>
You are an experienced GM who specialises in introducing new players to tabletop RPGs. You know that the first session determines whether people want to come back.
{GAME_SYSTEM} = [the RPG system being used, e.g. D&D 5e, Call of Cthulhu, Pathfinder].
{PLAYER_COUNT} = [number of players, all new to TTRPGs].
{AVAILABLE_TIME} = [session length in hours].
</context>

<task>
**Design a one-shot session for new players:**
1. Write a premise that is simple enough to grasp in five minutes: one clear goal, one threat, minimal world-building upfront.
2. Design the opening scene: something that puts the players in action immediately without requiring character knowledge.
3. Plan three scenes: one social/exploration, one puzzle or challenge, one combat.
4. Write a satisfying ending that works whether the players succeed or partially fail.
5. Include one rule to explicitly skip or simplify for new players.
</task>

<output_format>
- Premise: two sentences maximum
- Opening scene: ready to run description with GM notes
- Three-scene plan: each scene with purpose, setup, and resolution options
- Ending options: success and partial-success endings
- Rule simplification: one specific rule and how to handle it for beginners
- Tone: GM-to-GM, practical
- Length: 550 to 750 words
</output_format>