I Come from the Deep Sea

Microcthulhu style, borrowing some settings. She is a stranger from the deep sea. In order to be free, she made a promise to a traveler and promised to fulfill his will. Her story begins in a fishing village. I didn't expect that this small fishing village would hide so many secrets. A weird family, an island hidden in the mist, a platform that you can't get out of... And a human nature that you can't see clearly. She originally wanted to be an observer, but she gradually became involved and was forced to be involved in several turmoils. After the turmoil, where would her freedom be?