朱蘭早與富家子徐堅(jiān)白(張揚(yáng))相戀.朱蘭自幼父母雙亡,由叔嬸養(yǎng)大,但叔嬸卻因貪財(cái)而將她許配予同村的軍人李志忠(朱牧).堅(jiān)白在外地求學(xué),假期回鄉(xiāng)與蘭每晚相聚,被人發(fā)現(xiàn),李志忠的父母聞?dòng)?要求退婚,叔父(吳家驤)怒摑蘭,被志忠阻攔,蘭感動(dòng)不已.秋明心儀堅(jiān)白,主動(dòng)相邀.晚飯后堅(jiān)白突感不適,秋明將他接回家中靜養(yǎng),親侍湯藥,堅(jiān)白對(duì)秋明好感油然而生.蘭知悉秋明與堅(jiān)白同校同宿,自…朱蘭早與富家子徐堅(jiān)白(張揚(yáng))相戀.朱蘭自幼父母雙亡,由叔嬸養(yǎng)大,但叔嬸卻因貪財(cái)而將她許配予同村的軍人李志忠(朱牧).堅(jiān)白在外地求學(xué),假期回鄉(xiāng)與蘭每晚相聚,被人發(fā)現(xiàn),李志忠的父母聞?dòng)?要求退婚,叔父(吳家驤)怒摑蘭,被志忠阻攔,蘭感動(dòng)不已.秋明心儀堅(jiān)白,主動(dòng)相邀.晚飯后堅(jiān)白突感不適,秋明將他接回家中靜養(yǎng),親侍湯藥,堅(jiān)白對(duì)秋明好感油然而生.蘭知悉秋明與堅(jiān)白同校同宿,自慚形穢.亮寫信給他,佯稱已自對(duì)象,提出分手.堅(jiān)白接信,傷感不已,轉(zhuǎn)移接受秋明愛意.堅(jiān)白因祖母(歐陽莎菲)病逝,回鄉(xiāng)奔喪.弟弟堅(jiān)中(田青)告以實(shí)情,堅(jiān)白對(duì)蘭愛念復(fù)熾,相約私奔.秋明到訪.得悉二人的私奔計(jì)劃,趕往勸阻蘭.卻發(fā)現(xiàn)蘭原來肺病纏身,但蘭不忍連累堅(jiān)白,終于打消私奔之念.蘭與明一夕長談,竟成知己.堅(jiān)白意冷心灰,黯然北上投考大學(xué).途中結(jié)識(shí)爽朗熱情的少女蘇亞南(葉楓),在她鼓勵(lì)下參加了救國運(yùn)動(dòng),并對(duì)南情愫暗生.堅(jiān)白離開后...