substory

noun
UK /ˈsʌbˌstɔːri/
US /ˈsʌbˌstɔri/

A substory is a smaller story that happens inside a bigger story.

The video game has a substory about a lost cat that you can play between the main missions.


OTHER MEANINGS

2. A smaller news item that appears within a larger news report.

The newspaper ran a substory about the local fair inside its weekend feature.

3. A branch of a story in a game or book that you can choose to follow.

Completing each substory unlocks a special reward in the game.

4. A short tale told inside another tale, like a story within a story.

The old sailor told a substory about a stormy night at sea.