纯(chún )祖(zǔ )(👷)一年,丁若铨(薛景求饰)因受(shòu )辛酉迫害(hài )事(shì )件(🔱)影(yǐng )响被发配到(🔧)遥远的(🆖)黑山岛。来(🍖)到岛上后,丁若铨(🎾)对这(zhè )里的海(hǎi )(🎲)洋生(shēng )物产生了浓厚的兴趣,并决(👑)定写一本关于海洋生物(💆)的书(shū )(🔲)籍(🥄)。他向在(zài )这(zhè )里土(🛺)生(shēng )土(🎿)长(zhǎng )、熟识各种(✖)海洋生物的青年渔夫昌(chāng )大(🐖)(卞耀汉饰(🚢))(🌙)寻求帮助,但最初昌大因丁(🖲)若铨(quán )是戴(dài )罪之身而拒绝(jué )。后丁若(📙)铨了(✋)解到昌(chāng )(🙌)大在(zài )自学识字(zì )的(🙀)过程中常(cháng )遇(yù )到(dào )(🈴)困难,于是(shì )提议将各自擅长的知(zhī )识(shí )教授(shòu )对(🎋)方(fāng ),昌(🐀)大(dà )最终同意,两人也在相互(❕)碰(pèng )撞(💹)中(zhōng )成为(🥊)了彼此的良师益友。然而,丁若(ruò )铨(quán )在(zài )得知昌大(🌪)学习(🌼)的(🚶)目的是为仕(shì )(😝)途(🔈)后大(🙎)失所(suǒ )望,昌(🤔)大(📧)也明白两人各有志(zhì )向,亦师亦(yì )友的二人决定(dìng )分(fèn )道扬镳……