How to Find and Fix Plot Holes in Your Novel

Beta reader comes back: "Wait, how did she get there if she was in Paris in chapter 4?" Or: "Why didn't he just use the phone?" These are plot holes — moments where the story's internal logic breaks down. Some are cosmetic. Some are structural. Both erode reader trust, and both can be fixed once you find them.

Types of Plot Holes

Not all logic gaps are equal. A continuity error (a character's eye color changes) is easy to fix. A motivation hole (the character does something that makes no sense given what we know about them) requires more work. A structural hole (the climax only works because a character had information they had no way to get) might require reworking multiple chapters.

Knowing which type you're dealing with tells you how big the fix needs to be.

How to Find Plot Holes Systematically

• The reverse outline. After drafting, write one sentence per scene describing what happens and what new information each character has after the scene. Then read it in order. When a character acts on knowledge they shouldn't have, or lacks knowledge they should have, you've found a hole.
• The antagonist logic test. Ask: what does the antagonist know, when do they know it, and how? Many holes come from antagonists who are inexplicably uninformed or inexplicably informed. Run through the story from the villain's perspective.
• The "why not" test. For every major plot point, ask: why doesn't the protagonist just ___? If the obvious solution exists and your character doesn't try it, you need to either have them try it and fail, or establish why it's not available.
• The coincidence test. Mark every moment where things work out because of luck, coincidence, or a character conveniently knowing something. One coincidence can feel earned. Three coincidences is a structural hole.
• Read for timeline. Track where every major character is, what time it is, and how long travel/action takes. Continuity errors often hide here.

How to Fix Them

• Plant it earlier. Most logic holes can be filled by adding a small earlier scene or line that establishes the information, object, or ability. The character couldn't have known about the tunnel? Add a line in chapter 2 where someone mentions it offhand.
• Raise the cost. If the obvious solution is "why doesn't she just call the police?" — let her try, have it fail, and show why. The attempt closes the hole and often adds a scene worth having.
• Reframe the character's knowledge. If your character acts on information they shouldn't have, you can add a scene where they get it, or rewrite the scene so they act on a reasonable guess rather than certainty.
• Embrace one coincidence, eliminate the rest. If you can't fix a coincidence, at least make it the only one in the story. Readers accept one lucky break. They lose patience when the protagonist survives through repeated dumb luck.