Guido Verelst filmed his own niece Anne for more than three years. During that time, Anne starts a relationship and works her way to independence. However, she prefers to be underwater. From an early age, water attracted her: bathtubs, swimming pools, you name it. She can swim surprisingly well and is able to hold her breath for as much as 3 minutes and 40 seconds: a real mermaid.

In her daily life, her visual impairment and ASD come into play. Medication her grandmother took years earlier caused her to be born prematurely. As a result, Anne's life turned out differently than expected. Consequently, her relationship with her boyfriend raises some additional questions: can he take on the care her parents provide? To what extent can she continue without them? 

Getting through to the real Anne is not always easy with a camera crew, which is why she also keeps a video diary. She's most herself underwater: there she feels like someone else, a superhero with no boundaries or obligations.