Mary Kate would go watch the dolphins play everyday in the ocean. She wasn't allowed to go out when the waves wear big because they were too dangerous. She knew there was something special about the Dolphins. Mary Kate was different though. She wasn't always human.
Mary Kate would turn into a mermaid each time a dolphin was under attack. She was always saving the dolphins lives. That was her job. She was queen of Dolphania.
One day a big wave hit Mary Kate and her boat was destroyed. She was only on a piece of the boat and was surrounded by sharks and other sea animals. She didn't want to use her power and get in the water because she was afraid.
Then Your dolphin friends showed up and saved the day! They fought off the sharks and Orcas, but the orca's and sharks fought back. Mary Kate had jumped into the water but became a permanent mermaid and would not be able to change back to a human being.
After the storm had passed by, some the the orcas and sharks were beached. You called for help and you and the dolphins were put back into a truck of water and brought into an aquarium while the sharks and orcas that were still alive, were helped and free'd back into the ocean.
At the end, all and all worked out and you saved your dolphin friends by putting them into an aquarium. You too were put in the aquarium and you were now a permanent mermaid. You were all safe and sound had, at one point, saved each others lives.