Amidst a rising wakesurfing craze, surf instructor Man (Renci Yeung) is falsely accused and publicly shamed online. Among the trolls is Chuan (Jeffrey Ngai), a surfing novice whose satirical video mocking her goes viral. Upon realizing the rumors were entirely fabricated and that he has ruined her reputation, a guilt-ridden Chuan signs up for Man's lessons under his real identity to make amends. As they connect beyond the digital noise, a genuine romance blossoms. To clear her name, Chuan devises a plan to expose the disgruntled student who started the smear campaign, while encouraging Man to reclaim her professional standing by challenging celebrity coach Joe (Kevin Chu).

《浪花男女》是首部以Wakesurf为主题的华语电影，故事讲述冲浪教练孙漫因网络谣言被公审，而一名原本对冲浪一窍不通的青年阿川，竟以网名“太平洋白鲊王”制作嘲讽短片并意外爆红。当他发现自己跟风嘲弄的对象其实被抹黑，阿川决定以真实身份向孙漫学习冲浪，由一个键盘黑粉，逐渐成为最努力为她平反的人。