原來施詠和余浪沖同樣曾被網絡欺凌，因此她更希望余浪沖可以重新振作，並承諾只要他游，一定會看到。新一屆的水運會成為李馬榮與黃亞樂競逐全場總冠軍的舞台，黃亞樂終完成個人的「大滿貫」，將紀錄榜上所有項目變成他一人的名字。相反，李馬榮為要破黃亞樂的紀錄而選擇了大量長途賽事，將體力燃燒殆盡之餘，更要在100米背泳的賽事中面對突飛猛進的班長。班長為幫助李馬榮戰勝黃亞樂，因此主動讓賽以為掩護，卻被李馬榮視為極大侮辱，兩人產生激烈衝突。
With Si Wing's help, Yu Long Chung regains the confidence to race after the previous humiliating accident. Wong Ah Lok ambitiously aims at breaking all school records and winning the place of overall champion in the swimming gala, and the boys in Class C, Ma Wing in particular, want to challenge him. However, due to Ma Wing's miscalculations, things are not going as planned.
