Okay so heres the summary of what should happen in season one.
Elle is staying in a town she's only been to once so she decides to explore. She goes to Lake Pertobe to play. Whilst walking around Lake Pertobe, Elle finds this waterfall with a pool inside one of the rocks. She climbs up the rocks and admires the pool, even though there are spiderwebs everywhere. She starts swishing the water around to find a ring with red gems on it. She picks it up and puts it on. Then when she home, she realises the ring won't come off so she tries to get it off with water. Then she falls over and see's she a mermaid.