noun
underplot; subplot
A secondary plot in a story, drama, or film; a literary term. Used in critical or analytical contexts.
この小説のアンダープロットは、主人公の家族の物語を描いている。
The underplot of this novel depicts the story of the protagonist's family.
Also means 'subplot', but アンダープロット is less common and may carry a slightly more literary or technical nuance.
Borrowed from English 'underplot', a compound of 'under' and 'plot'.