HAN lives with her father TAK after her parents’ divorce. She has been in love with an undergraduate LOK for a long long time but doesn’t dare to tell him. This is why her friend FUNG likes to make fun of her. TAK used to be a fast swimmer but the break-up of his marriage has damaged his confidence. His swimming team faces a lot of problems due to his poor management. They are not even allowed to use the swimming pool during peak hours. LOK’s friend LUI has met TAK’s younger daughter WING on the Internet. They have become cyber-couples and been engaged on the net. WING comes to Hong Kong for a special training program, and would like to take this opportunity to visit her father and elder sister. WING finds that her internet-husband is a person who judges others by external appearance. She disapproves of it and decides to play a trick on him. HAN tries her best to persuade TAK’s students to stay……

HAN has discovered that WING is her younger sister who has been separated from the family for many years. She wonders if she should let TAK know about the truth. WING stays in Hong Kong and challenges CRYSTAL, the best swimmer from the Sky Swimming Club, into a contest. WING falls into CRYSTAL’s trap and doesn’t perform as well as usual. She is later punished by the coach for it. TAK is shocked to discover that WING is his daughter. WING mistakes LOK for her cyber-fiance. When she finds that LOK is going on a blind date, she gets a little jealous and tries to stop him. LOK explains to her that this is just a misunderstanding. He then brings her to LUI asking for clarification. WING is so angry that she pushes LUI into the sea. LOK helps HAN to fix a damaged floppy disk and happens to come across the annual accounts of TAK’s swimming team. Noticing how WING addresses LOK, TAK guesses the pair may have been married……

Coach of the Sky Swimming Club WAI has designed a special training program for WING, which makes CRYSTAL very jealous. WAI asks WING to throw a stone and see how it goes. He is actually trying to get her to learn how to tumble turn. It is rumored that the Angels’ Swimming Team is splitting up. HAN suspects LOK of spreading the rumor. To rescue the Angels from financial crisis, HAN makes a great effort to recruit students, and LOK offers to help her out. LOK suggests to WING that she should adjust the speed and angle of rotation so as to get a much faster turn. WING keeps practicing but still does not perform as well as CRYSTAL. She also does a lot of exercise trying to build up her muscles. TAK points out that the tumble turn designed by WAI is not suitable for WING. He tries to get WING to learn a tumble turn that he has invented – the ‘Ice-breaker Tumble Turn’, but in vain……

HAN persuades WING to join TAK’s swimming team but WING turns her down. YAN’s housekeeper SA encourages YAN to woo YEE, as she knows that he is still in love with YEE. YAN offers to sponsor the Sky Swimming Club on behalf of his company. He is not happy with CRYSTAL’s attitude and decides to dismiss her. YU, the girl whom LOK met on a blind date, falls in love with LOK and keeps following him around. HAN recognizes YU as her former schoolmate. She persuades YU to join TAK’s swimming team, but doesn’t succeed. HAN goes to the police station to provide information about the robbery that took place some time ago. HAN recognizes YAU as one of the robbers. She invites YAU to join the Angels’ Swimming Team but is mercilessly teased by YAU. HAN happens to discover that YAU is forced by her parents to study abroad. She explains to YAU that joining the Angels is the perfect excuse for her to stay in Hong Kong……

YEE and WING plan to move into TAK’s house so that YEE can look after HAN in a better way. YEE claims that she will bring HAN back to the States. TAK strongly objects to this but cannot change her mind. YEE asks to have a look at HAN’s pictures and HAN doesn’t know what to do. Luckily TAK comes along and stops her in time. TAK tries to have a talk with WING, in the hope of patching up their relationship. WING, however, talks down to him and says that she no longer needs him. He is therefore very disappointed. TAK needs WING and her teammates to start with the basic training before they get any further. WING disagrees with him, thinking that this way of training is already out of time. LOK introduces HAN to a prominent orthopedic surgeon. YEE is so concerned about HAN’s progress and HAN is worried that her secret will sooner or later be revealed. To play for time, HAN claims she is not willing to have the operation……