The swimming team is deflated after its captain, Tin Heng, passed away tragically. However, a reserve of the team, Gei Yuen, works his way up in hope to represent his captain in competitions and to boost the team's morale. His mind may be focused on Tin Heng whom he idolises, but he cast his watchful and silent infatuated glances on Tsz Suen, Tin Heng's girlfriend and member of the girls' swimming team, who remains aloof and even apparently nonchalant about her boyfriend's death. Gei Yuen originally thinks Tsz Suen is dismissing her emotions to mask her sadness. However, he finds out that she is harbouring a secret...

當隊長天恆溺斃逝世後，游泳隊就漸漸失去了原有的士氣。然而，隊長女友即學姐的奇怪舉動讓學弟紀元感到困惑。在他追問之下，學姐終於剖析了男友逝世的真正原因....