故事发生在1927年的民国时期，启泰（雷诺儿 饰）在误打误撞之中救下了一条就快要死掉的美人鱼子萧（于小琬 饰），遗憾的是，子萧那被黑帮老大捉住的母亲没能够获救，黑帮老大更是因为食用了人鱼肉而获得了不老不死的永生。 一晃眼一百年过去了，子萧长大成人，她一直没有忘记曾经救过自己的启泰，于是决定重返人间，寻找前世的救命恩人，留给子萧的时间不多了。一次偶然中，子萧邂逅了富家大少爷鸿泰（金瀚 饰），鸿泰的英俊和潇洒深深的吸引了子萧的注意，令她坠入了情网，不仅如此，鸿泰还有着和启泰一模一样的相貌。
Based on true events Little Secret is a film with three interlocked stories all connected by a single secret that converge to reveal the tragic yet beautiful lives of three families and how hope, dreams and destiny can unite people from very different parts of the world. Adopted at childhood by a loving family after facing the loss of her parents, Kat led a life full of adventures. Now in her teenage years she is trying to fit into a "normal" life, as the world shows her how cruel living can be. After discovering a secret which threatens her life, she wonders if her dreams are still possible. Heloisa is a dedicated mother who has been entrusted with the secret and will do everything to keep her family together; however, she knows that the future is unpredictable. Jeanne, a beautiful young Amazonian native, falls in love with Robert, a New Zealander, with whom he discovers that her possibilities are infinite, however she forgets that destiny has plans of its own. Barbara, an older ...
