Secreta

This kingdom lies in the unexplored depths of the ocean. There is an entire civilization of merfolk hidden through a deep cave in a trench. The merfolk are getting ready for a big festival that takes place on the summer solstice. A marine biologist finds this civilization and must decide if she's going to reveal them to the world or if she is going to fulfill the prophecy claimed to be about her. She spends the month leading to the festival living among the merfolk as a mermaid. She sees their palace, villages, and even their markets. The main city is huge and magical. Merfolk and marine life live in harmony, and there are lots of secrets that scientists haven't discovered yet.