The Fantastic Water Babes (2010)

"Hong Kong's Cheung Chau Island is a small place where people are born and raised and can enjoy a comfortable life without much ambition. However, Luo Jiao (played by Gillian Chung), the "beautiful girl from Cheung Chau", happened to be stubborn. In order to avenge a slap from her love rival, she decided to rope in a few good sisters to participate in the "Water Lotus" 4x100 swimming..."