Natalia De La Cruz Rivera y Santiago, also known as Nat, was swimming neighborhood kids out of their money at the local Inglewood pool when her life changed. The LA Mermaids performed, emerging out of the water with matching sequined swimsuits, and it was then that synchronized swimming stole her heart. The problem? Her activist mom and professor dad think it's a sport with too much emphasis on looks -- on being thin and white. Nat feels more like a submarine than a mermaid, but she wonders if she might be both.