天才泳手余浪沖轉校來到《啟賢中學》C班，認識李馬榮、班長、大秋、阿帆等接力隊隊友。隊長李馬榮性格剛烈，不甘長年敗給A班；余浪沖的出現，令李馬榮感覺找到泳隊最後一塊拼圖，足以挑戰明星泳手黃亞樂領軍的A班！為此，李馬榮將多年隊友大秋貶作後備，令對方極度不滿。然而李馬榮一意孤行，接力隊在賽前已陷入分裂邊緣。Miss翁首次來到男校當上班主任，眼見李馬榮為了比賽而採取各種「極端手段」壓逼隊友而深感擔憂，卻逐漸發覺對方背後正施行一項危險的策略。
Yu Long Chung, a new transfer student gets to know the swimming team captain, Lee Ma Wing. Ma Wing has always wanted to win the inter-class relay championship. So he invites Long Chung to join the team, but it ends up causing a conflict between Ma Wing and one of his teammates.
