中學最後一屆水運會，余浪沖無忘與施詠之間的承諾，接受李馬榮的挑戰，再次參加50米自由泳。多年來亦師亦友的二人，終於成為直接對手，首次正面對決。這場天才與努力的對決，終於有了結果。然而兩人卻因為Miss翁被辭退一事而產生誤會，兄弟決裂。神秘泳手章浩以《冠中》校友的身份向余浪沖下戰書，約戰一場4x50四式接力賽！為迎戰這個被譽為「努力的天才」，余浪沖必需找回擅長蝶泳的李馬榮重組接力隊，眾人的大學生活再起波瀾……
Desperate to win Si Wing back, Yu Long Chung tries every possible attempt but fails, and he finally takes Ms. Yung's advice to be the real him again. He decides to participate in the 50m freestyle event and fights against Lee Ma Wing, his mentor. When news about Lee Ma Wing and Ms. Yung makes the headlines, Lee Ma Wing flies into a rage and searches for Ms. Yung everywhere, but she is nowhere to be found.
