Logline
A logline is the single sentence that captures who your protagonist is, what they want, and what stands in the way: the one line every pitch, query, and back-cover blurb is built on.
Part of: Ship Dock (Submission Workshop) · Used in: Query letters, pitches, comp conversations
What it is
A logline is one sentence that tells a stranger what your book is about and why it matters. It is the answer to the question every agent, reader, and bookseller asks first: in a line, what is this story? Borrowed from screenwriting, where a film gets pitched in the time it takes to ride an elevator, it now does the same work for a novel: a query letter opens with it, and a back-cover blurb is its longer cousin.
A working logline rests on three parts: a specific protagonist, a concrete want, and the obstacle between them. Drop any one and the sentence goes vague: "a woman must overcome her past" tells us nothing, because there is no specific want and no specific thing in the way.
What each part looks like:
- A specific protagonist: not "a detective" but "a disgraced lip-reading detective." The detail does the work; it promises a particular book, not a category.
- A concrete want: the goal that organizes the plot. To clear her name, to reach the capital before the thaw, to win back a stolen birthright. A want you can fail at.
- A real obstacle and its stakes: the thing in the way, and what it costs if the want goes unmet. The obstacle is what turns a premise into a story.
A logline is not a tagline or a synopsis
Three forms get confused. A tagline is the mood line on the cover ("Some doors should stay closed"); it sells a feeling, not a plot. A synopsis walks the full arc, ending and all, across a page or two. A logline sits in between: one sentence, plot-shaped, no ending revealed. It is the most compressed honest description of the book that still makes someone want to read it. Get the logline right and the query letter, the elevator pitch, and the comp-titles conversation all get easier.
Inside Ship Dock, StoryHelm reads the manuscript you already wrote and reflects back what it found: who the protagonist is, what they appear to want, and where the central obstacle sits. It points out when a draft logline names a want the book never delivers, or buries the protagonist behind a setup clause. StoryHelm drafts a few candidate loglines in different framings, each grounded in the story you actually told, so you have a true starting line to sharpen into the sentence you pitch.
An example
Here is the difference a specific want and obstacle make, using the same book described two ways.
The same sentence feeds the query letter's hook and points you toward the right comp titles. Open the Ship Dock entry →
Related terms
The logline anchors the rest of StoryHelm's submission vocabulary. It is also one rung of the publishing and business work an indie series author has to get right.
Ship Dock
StoryHelm's submission workshop: query letter, synopsis, logline, comp titles, and bestseller benchmark, all in one place.
ReadQuery Letter
The one-page pitch to an agent or editor. Its hook paragraph is the logline, expanded into a few sentences of story.
ReadComp Titles
The published books you name to place yours on a shelf. A sharp logline makes the right comps obvious.
ReadThe full A–Z
Every StoryHelm term in one index, from Canon and Coherence Guardian to Ship Dock and Translation Studio.
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