1970年(nian)(nian)(nian)代(dai)后(hou)期(qi)長江某客(ke)輪一批電影廠演員(yuan)的(de)(de)(de)到來(lai)擾亂了“朝云”號客(ke)輪的(de)(de)(de)平靜正在(zai)戀(lian)愛(ai)中的(de)(de)(de)吳素琴通過接觸發現了楊(yang)(yang)(yang)英、張(zhang)(zhang)戀(lian)水(shui)(shui)之(zhi)間一段鮮為(wei)人知(zhi)的(de)(de)(de)故事十(shi)幾年(nian)(nian)(nian)前楊(yang)(yang)(yang)、張(zhang)(zhang)二人同在(zai)運河學校(xiao)學習久而久之(zhi)張(zhang)(zhang)對楊(yang)(yang)(yang)產生感情(qing)欲吐又止因為(wei)楊(yang)(yang)(yang)英心中藏著一個不(bu)為(wei)人知(zhi)的(de)(de)(de)密秘那就是(shi)哥(ge)哥(ge)楊(yang)(yang)(yang)明(ming)張(zhang)(zhang)戀(lian)水(shui)(shui)不(bu)知(zhi)內情(qing)當見到楊(yang)(yang)(yang)明(ming)來(lai)看望妹妹時他向楊(yang)(yang)(yang)明(ming)傾吐了對楊(yang)(yang)(yang)英的(de)(de)(de)愛(ai)慕(mu)之(zhi)意但(dan)楊(yang)(yang)(yang)明(ming)的(de)(de)(de)道(dao)白卻大出張(zhang)(zhang)戀(lian)水(shui)(shui)意料之(zhi)外(wai)原來(lai)楊(yang)(yang)(yang)明(ming)與(yu)楊(yang)(yang)(yang)英并不(bu)是(shi)真正的(de)(de)(de)兄妹楊(yang)(yang)(yang)英幼年(nian)(nian)(nian)時家中遇難(nan)是(shi)楊(yang)(yang)(yang)明(ming)的(de)(de)(de)父親救了年(nian)(nian)(nian)僅兩歲的(de)(de)(de)楊(yang)(yang)(yang)英從(cong)此相依(yi)為(wei)命成年(nian)(nian)(nian)后(hou)楊(yang)(yang)(yang)英深(shen)愛(ai)上楊(yang)(yang)(yang)明(ming)不(bu)久后(hou)楊(yang)(yang)(yang)明(ming)在(zai)一次搬移航標燈時不(bu)幸殉難(nan)楊(yang)(yang)(yang)英陷入(ru)悲(bei)苦之(zhi)中.