Backstage at a children's piano competition, Tang Yun's daughter, Xiao Dingdang, is afraid to ride the elevator because of her fear of the dark. Music director Lin Yue taunts her, goading Xiao Dingdang to enter alone. Lin Yue then secretly sabotages the elevator, causing it to malfunction and the lights to go out, trapping Xiao Dingdang inside. As Tang Yun anxiously confronts Lin Yue, Xiao Dingdang's father, the distinguished Mu Nansheng (Seventh Master), arrives just in time to hear his daughter's cries for help, setting up a suspenseful turn in the plot.
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