A/N: Eva's Story follows the life of Eva, the mermaid who saved the world from the comet in 1740. Although she is not a major character in H2O and was only mentioned a few times, I've always wondered what happened to her. After all, Eva never came back after fighting the comet, leaving her fate unknown. Therefore, this is my interpretation in who she was, how she battled the comet, and why she was never seen again. I do plan for Rikki, Bella, and Cleo to appear later on, but they won't be the primary characters.

I really hope that you enjoy this story and take a glimpse into Eva's life and destiny. This is my first fanfic and I would love to hear what you think! :)

17 October, 1739

A young woman donned in a crisp green dress slowly walked across the sand in what seemed to be a cave. She was silent, her endless emerald-green eyes swiftly looking at a wall of beautiful rock, which was bordering almost the whole cave. The woman turned around and looked down at a pool filled with inviting blue water. The pool was a decent size, just like the rest of the cave, and had a remarkable view of the ocean and the world surrounding it.

The sun was slowly setting across the horizon, the sky turning a warm collage of pink, purple, and orange. There was a slight breeze that gently flowed through the cave, gracefully blowing the woman's fiery mane of red hair. The peaceful sound of waves hitting the land below was reassuring, as if being there was only like being with one's self and the sea. The cave seemed a whole new world in itself, teeming with the feeling of magic. The place felt wholesome and serene, almost too beautiful and whimsical to be something found on the planet Earth.

Of course, this young woman was tingling to give into the temptation of swimming in such a wondrous place. Yet, she only sighed deeply, knowing that she couldn't.

The woman managed a smile as she took another look around the cave. After all, this place did hold special memories, more or less of magical beginnings, in her heart. The cave was her place, somewhere to escape to, a place that truly understood. She called it The Sea Caves.

But, the woman's smile slowly faded as she watched the sun disappear under the ocean's horizon. It would be nighttime soon… and tonight was not the time to be out in the open.

"'Tis of time to part." The woman said, her voice soft and elegant, complete with an Irish accent. She bowed her head as if saying farewell to the cave and headed out towards a somewhat hidden land entrance.

The woman turned around once more before she left the cave. She placed her hand over a necklace and smiled. The necklace was a perfect blue crystal in the shape of a sea star. It was tied around her neck with a simple brown leather rope. It was magical, for it had come from the cave.

However, once she had removed her hand from the crystal, it had shimmered. The crystal was giving off a faint light, shimmering as if it were trying to channel something. The woman did not take notice of this, from the fact that it had happened so quickly and discreetly. The woman turned around and headed back towards the land entrance, which would lead her back to her village.

Once she had gone, the cave seemed to come alive. The walls shimmered, just as her crystal had done moments ago. The cave was awakened from a deep sleep, and it seemed to wake for one specific reason. A bright full moon lazily crept out of the ocean's horizon and the walls of the cave seemed to shimmer harder… preparing for something that could spell ultimate disaster.

And little did the young woman know that her life would never be the same again.