Introduction: Why B Stories Matter More Than You Think
When writing a script, most writers obsess over the A story—the main plot. But often, what gives a film its emotional weight or thematic depth is something else entirely: the B story. The B story in screenwriting refers to the secondary storyline that runs alongside the main plot, adding contrast, character growth, or thematic reinforcement.
Ignoring this layer can lead to flat characters or underwhelming resolutions. Let’s explore how the B story elevates storytelling and why it’s a powerful tool for screenwriters.
What Is a B Story in Screenwriting?
The B story in screenwriting is a subplot that supports and contrasts the main narrative (A story). It typically focuses on secondary characters or aspects of the protagonist’s journey that aren’t directly tied to the main goal but offer emotional insight, personal stakes, or a change in tone.
📌 Quick definition: A B story is a secondary narrative arc that enriches the main story through emotional development, parallel themes, or relationship subplots.
Key Purposes of a B Story
Here’s what the B story brings to your screenplay:
1. Emotional Depth
The B story often explores the protagonist’s internal world—desires, fears, or unresolved conflicts—making the overall story more relatable.
2. Theme Amplification
B stories can reinforce or challenge the central theme. For example, if the A story is about justice, the B story might explore mercy.
3. Character Development
By placing the main character in new situations or relationships, the B story shows how they evolve beyond the central plotline.
4. Pacing and Structure
Secondary stories offer breathing room between high-stakes moments in the A plot, helping you manage tension and rhythm.
5. Emotional Payoff
B stories often resolve just before or during the climax, adding layered emotion to the main resolution.
Examples of B Story in Screenwriting
Let’s break down how famous films and shows use B stories:
🎬 Back to the Future (1985)
A Story: Marty must get back to 1985 using the time-traveling DeLorean.
B Story: Marty’s efforts to make his parents fall in love, ensuring his own existence.
🎬 Breaking Bad (TV Series)
A Story: Walter White builds a drug empire.
B Story: His relationships with his wife, Jesse, and Hank—each showing moral tension and human conflict.
🎬 Legally Blonde (2001)
A Story: Elle tries to win back her boyfriend by going to Harvard Law.
B Story: Elle discovers her own intelligence and purpose through friendships and self-growth.
Where the B Story Fits in a Script
In traditional three-act structure, the B story usually appears at the end of Act One or the start of Act Two. This is often the moment when new characters or environments are introduced, creating space for a subplot to begin.
📝 Pro Tip: A strong B story should not distract from the main plot—it should enrich it.
B Story vs. C Story: What’s the Difference?
Sometimes, screenplays have more than two threads. Here’s how they differ:
Tips to Write a Strong B Story
✔️ Tie It to Theme
Use the B story to explore a different angle of the main theme.
✔️ Make It Character-Driven
Focus on emotional journeys, not just plot twists.
✔️ Use It to Mirror or Contrast the A Plot
A romantic B story in a crime drama can balance tone while adding depth.
✔️ Give It a Resolution
A satisfying ending for the B story enhances the final act of your screenplay.
Final Thoughts: Elevate Your Script with a Strong B Story
The B story in screenwriting isn’t just filler—it’s the emotional engine that can make your story memorable. By developing a meaningful secondary plot, you give your script greater texture, pacing, and resonance. Whether it’s a budding romance, a troubled friendship, or a moral dilemma, the B story offers a chance to deepen your world and humanize your characters.
So next time you outline your screenplay, don’t just think about the main goal—ask yourself what’s happening underneath it.
STUDIOVITY AI helps you organize your B story elements seamlessly—ensuring your subplots stay aligned with your script’s core theme.
