纯(🌠)祖一年(nián ),丁若铨(薛景求饰)因(🌰)受辛(🕋)酉迫害事(shì )(🛍)件影(yǐng )响被发配到遥(yáo )远的(🆖)黑山岛。来到岛上后,丁若铨对这里的海洋生(❣)物(wù )产生了浓(😎)厚的兴趣(qù ),并决(👑)定(dìng )写(🤷)一本(běn )关于(yú )海洋生物的书(🔲)籍。他向在(zài )这里土生土长、熟识(shí )各种海(hǎi )洋(😻)生(🚸)物的青年(nián )渔夫(🤯)昌(😱)大(🐖)((🤷)卞耀汉饰(🚢))寻求帮助,但最初昌(chāng )大(⏯)因丁若铨(quán )是戴(dài )(🦗)罪之身(🌊)而(ér )拒(jù )绝(jué )。后丁若铨了解(🐑)到(dào )昌大在自学识字的过程(chéng )中常遇到困难(⛏),于(yú )是提(tí )议将各自擅长的知识(shí )教(🏯)授对(duì )方,昌大(dà )最终(🧣)同意,两人也在相互(hù )碰撞中(zhōng )(💔)成为了彼此(cǐ )的良师(shī )益友。然而,丁若铨在(zài )得(🥋)知昌大(dà )(🌪)学习(🌼)的(🚶)目的是为仕途后(🏒)大(🙎)失所(🎥)望,昌大(📧)也明白两(liǎng )人(📛)各有志向,亦师亦友(💸)的二人决定分道(dào )扬(📐)镳(biāo )……