唐(🈯)朝太宗年间，某夜唐太宗梦见(🏽)身陷险(🔼)境(jìng )，幸得(dé )一(🕟)白衣少年(nián )所救(jiù )。徐茂(mào )公解(🎹)梦，显示将(jiāng )有乱事，须得该(gāi )少(shǎo )(😧)年相助平乱(⏬)。太宗命张士(shì )(♑)贵(guì )往找应梦少年。原(yuán )来此应梦贤臣乃大(👁)将(jiāng )军程咬金之(🛹)救(jiù )命恩人薛仁(🛺)贵(📞)，仁(🎫)贵带着咬(yǎo )金所(🙁)赠(zèng )之令(lìng )(🖍)箭投军，期间更误堕(🔊)地洞而得奇遇…