“轻舞飞扬” 一个遗传红斑性狼疮的美丽女孩，立志活得真诚无愧自已，当她在网路上认识痞子蔡之后，便倾心於他的言谈他的思想，在两人见面之后，早已蕴酿已久的感情如洪渲 ，一发不可收拾，他们是为爱而爱，男孩在这种初悸的感动中只是懵懂，逐渐的，好像多了些什麽，增加了什麽。好友阿泰不时提醒痞子蔡爱情的虚幻、网路的虚幻，劝他不要放真感情，使痞子蔡陷入犹疑中，而阿泰自已则是一昧的追逐在实验爱情 。但是，突然的，在没有预警下，轻舞飞扬的生命结束了，离开人世；小鱼移情别恋。阿泰和痞子蔡似乎无所谓的，继续着自已的生活。表面上，轻佻的青春飞扬终於退去。实际上，对爱情的怀念和再也来不及追回的真心，是他们一致的成长经历

Tai and Choi are both fans of the internet, but they use it for different purposes. Tai uses it to chase women, while Choi uses it as to escape from reality, isolating himself from all those around him. While Tai is chasing after several girls, he meets Siu Yu. At the same time, Choi meets a girl named "Lightning Dancing Queen". As Choi's virtual world becomes more passionate, self-confident, and humorous, his life in the real world becomes more and more remote.