We all want to know what became of the Little Mermaid, who traded human legs for love from the prince’s underwater witch in exchange for her enchanting voice. Her name is Nokte, and once she was the younger princess of the underwater kingdom. Now she is the ex-wife—banished by her beloved to the very edge of the world, the Black Cliff, far from the court and cheerful life. She wanders along the seaside stones for a long time, where one day she discovers a dead triton. Now, together with Chaos, assigned to watch every her step on land, she will have to conduct the scariest investigation of her life. So a classic love story turns into a story of death, where the enemy becomes the closest thing in this cruel world.