Finally, it's the time of the year when Class A and C have the ultimate battle to determine the overall champion. Lee Ma Wing and the team employ a different strategy for the Battle of the Flying Fish, which leads to a jaw-dropping result. After the competition, the relay team encounters another challenge when their school receives an invitation for a friendly match with Gun Zung.

C班以上屆的原班人馬與A班展開終極對決，李馬榮的策略，加上脫胎換骨的余浪沖再次挑戰黃亞樂，在最後一棒展開新舊飛魚之戰。比賽過後，兩班惺惺相惜，化敵為友。然而，另一項挑戰隨即來到，名校《冠中書院》邀請《啟賢中學》派出校隊出席他們的校慶邀請賽。對於代表人選，Miss翁與焦Sir各持己見，更令李馬榮與Miss翁再起爭端。Miss翁突然失聯，令李馬榮擔憂不已，追尋下得知一切和Miss翁的舊友Tom有關，對方更提出與Miss翁合作辦藝術展覽，似是借意追求，李馬榮頓感不是味兒。