Little girl Shenxiu has felt empty and sad since her mum walked out on her and her dad, blaming herself for her leaving. The sadness she feels weighs heavy on her, and she seems more and more in a daze, a constant dream like state of mind. Longing and dreaming of the day that she will be united with her mother. Shenxiu`s Dad has a new wife and child, and wants to take them all on a family cruise. This is a dream come true for Shenxiu, she has been fascinated with the sea her whole life. One night on the cruise a storm throws her overboard, and she is soon faced with the Hijinx who seems to have been calling her to the sea all along. Joined by Nanhe who is the chef and boss of the Deep Sea restaurant, he also says that he too can get her to her mum Soon, they`re all drawn in a journey into the depths of the sea, but in this dreamlike world of colours and bizarre sea life, will Shenxiu find her way to her Mum, before the Red Phantom hones in on her sadness!