original source Randy Writes a Novel
If you're new to this whole GM/Director/Master of Minds malarkey, you'll probably look at the section on Clues and Spines in the main book and say 'crikey!' Possibly also 'foozle!' and 'pob!' because you have a full vocabulary.
A straightforward investigation can be seen as a series of scenes arranged in a straight line, with multiple ways to move from each scene to the one following it. Improvisation consists of reacting to the players by switching the order of scenes around or interpolating new scenes in this order. This is simple to write and run, but difficult to hide.
A looser structure will still consist of an investigative line, in which the Investigators pursue a series of core clues until they achieve a resolution of some sort. This is called the spine.
Trail of Cthulhu p192
Let's play amateur chiropractor.
The main setting for this example is Night's Black Agents, a modern-day spies v. vampires game. Characters for this example are Fibber McGee, a bang-and-burner; Molly, the black-bagger, Gildersneeve, the former crime scene investigator turned Cleaner, and Belulah, the wetworker. The setting is London.
Someone's blown a hole in it.
A very small hole, but a hole nonetheless. An apartment in a Wandsworth council house exploded thanks to a mistimed suicide vest, which the powers that be are covering up under DORA as a gas leak. There's an official investigation; the agents are parachuted in as 'experts' by whichever agency sponsors them. Edom, why not.
That's the Hook, and since I like to start with action the scenario will open at that point, with the agents and the official investigators poking through the crime scene in an uneasy, mistrustful partnership. This is the inciting incident and also the first point on the Spine.
Let's take a step back.
As Director, you already know a few things. For instance:
- You know who the OPFOR are;
- You know what they want;
- You know where this is going to end.
You probably also know your players' characters well enough to be able to plan around their MOS and investigative pools. That's not a given, though; this might be a one-off for a completely fresh group. However, if you do know that, say, Molly is a fan of Electronic Surveillance and Architecture, then you can plan for a few clues that allow her to make use of those pools.
You also know one other thing.
You know the type of scene that makes up the Hook.
Some scenes are action scenes, with all the explosions and broken bones that an action scene implies. Some are investigative. Some are interstitial; that is, it transitions from one moment to another. Whichever kind of scene it is will determine, to an extent, the kind of clues the characters might find, which in turn determines how they get from point A to point B.
This is an Investigative scene, which means agents will be drawing primarily on Technical and Academic pools. It's reasonable to assume that every group has at least some Technical and Academic expertise. Each character had the option to buy all sorts of pools at creation.
Fibber, being a bang-and-burner, is likely to be bringing his Forensic brain to bear on the equipment and debris found at the scene. Molly will want to use Electronic Surveillance, finding security camera footage from nearby businesses and combing through it. Belulah might use Streetwise or Urban Survival to find out if any local criminal groups supplied the bomber. Gildersneeve will be drawing on his Human Terrain abilities to track the bomber's social media posts and see if there's a connection to known extremist organizations.
All these are means by which each agent can find a clue that leads to the next Core scene. Possibly it will be a direct jump. There may be an interstitial moment, or an antagonist reaction, but ultimately clue A leads to scene B. You, as Director, know that the agents will do this; that's how it's supposed to work. Each point in the Spine is riddled with clues that are designed specifically for this purpose.
But.
Suppose we don't want this to be straightforward? Suppose we want a parallel spine?
In this example let's say that the OPFOR, being an extremist group puppeted by the Satanic Cult of Dracula, are meant to be detonating suicide jackets on the London Underground, spreading not just terror but also a vampire-spiced bioweapon that will create quasi-Renfields among those exposed, civilians and crime scene investigators alike. The intent being to create a subgroup of people desperate to join the Satanic Cult so they can get relief from their symptoms, while at the same time spreading terror and distrust of the bumbling authorities who let this happen.
Fine. That's what they want.
But they're not the only people in the game.
Which creates a second spine.
The first spine is about finding out who the bombers are, what their target is, and what their timetable is. If the agents are successful, they prevent the attacks. If they're only partly successful, or if they fail, then the bombs go off. That means conclusion of that spine comes when either there is a scene where the bombers are captured, or a scene in which the bombs go off.
Let's go a step further and say that there is a faction within Edom led by, Nails, why not, which wants those bombs to go off. If they do then it furthers his scheme, which is [whatever it may be]. Fort, who is the agents' sponsor, doesn't know which of the Princes is playing with fire and suspects this faction exists but has no proof.
This spine is completely separate from the main event. Since the opening scene of the main event relied heavily on Technical and Academic pools, it seems reasonable that this parallel spine relies on Interpersonal pools. Which, in this example, Belulah happens to be good at.
That gives the characters who didn't invest heavily in the other two pools a chance to shine on this parallel spine. While Fibber and the gang chase up Technical or Academic leads, Belulah breaks bones and blandishes informants in her Interpersonal search for the parallel truth at the end of the second spine.
Which ends when the agents either expose Nails' shenanigans or fail to do so, which pleases or embarrasses their sponsor Fort.
If I were to represent this with a diagram (I'm bad at drawing) it would look as if each spine started from the same point and then diverged. There might be occasional points where they intersect again. There might not. Both spines can be completed, or one might be completed and the other not, or the agents may fail to complete both.
Why do this?
First, because complication and conflict drive plot and plot is the objective in every investigative game, whether it's Night's Black Agents or Mutant City Blues. You want plot. You want the players to bathe in plot.
Second, because it gives the characters two chances to win.
Think about it. If the bombs go off then the characters lose entirely, if there's only one spine. However, if there's two spines then there are two chances to win. OK, one win - bombs go off but Nails is exposed - is at best a Pyrrhic victory. However, every victory is a victory if you're fighting an unholy war in the blood-soaked shadows of London.
The two spines can touch, in certain Core scenes. Let's say that the NPC investigative team is being led by someone who's indebted to Nails, for whatever reason, and tries to sabotage it so Nails' plan can succeed. The agents might use Interpersonal abilities like Cop Talk to find this out, or even to trace the team leader to a clandestine meeting with Nails.
However, for the most part it's a completely separate chase. Will the agents uncover Nails' involvement? Will they chase up the bombing angle without ever realizing that they're making an enemy within Edom, whether they foil Nails or embarrass Fort?
One last thing. I said at the start that knowing where this is going to end is one of the three definite things in every scenario. Well, there's one more thing.
You also know that there will be consequences, no matter which outcome occurs.
If the agents foil the bombing and expose Nails, then the consequence is the Satanic Cult lashes out, Nails may be removed and replaced, and Fort's star rises. All of which gives rise to future plot.
If the agents foil or partly foil the bombing and do not expose Nails, then Nails stays but is angry, Fort may also be embarrassed and angry, and the agents will catch hell. All of which gives rise to future plot.
If the agents do not foil the bombing and do not expose Nails, then there's a bunch of people out there - including them, perhaps - desperate for the cure that the Satanic Cult offers. Meanwhile Fort is off to Edom's equivalent of Slough House and Nails is reaping the rewards of service to Dracula. All of which gives rise to (sing along with me now, folks) future plot.
No matter which is the case, those consequences create more spines. Which creates complication and conflict. Which drives plot.
Goodness. Did I just mention Slough House? That's because this is exactly what Mick Herron does. There is an A plot, the supposed main plot, the bit that the blurb on the back of the book talks about. Then there is the B plot, the actual plot, the one you really ought to be paying attention to. The great advantage for Herron is that, as he has so many characters, he can split them along the different plotlines. That is exactly what I'm suggesting you do.
Enjoy!
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