sub-plot

n plot of a play, novel, etc that is separate from but linked to the main plot （戏剧、 小说等的）次要情节, 从属情节.

stylist, stylistic, stylistically, stylization, stylisation, stylize, stylized, stylised, stylus, stymie, stymy, styptic, suave, suavely, suaveness, suavity, sub, sub judice, sub-, sub-edit, sub-editor, sub-lieutenant, sub-machine-gun, sub-sequent, subaltern, subarctic, subatomic, subcommittee, subconscious, subconsciously, subcontinent, subcontract, subcontractor, subculture, subcutaneous, subcutaneously, subdivide, subdivision, subdue, subdued, subheading, subject, subject to,