Half human and half reluctant mermaid, Frederika Bimm finds herself investigating her watery roots in the latest instalment of her highly original and very funny romantic adventures. After spending her entire life without seeing another mermaid or merman, there are suddenly undersea folk all over the place when Fred visits the Black Sea. But Fred is still torn between her reluctant attraction to Artur, arrogant high prince of the mer-people, and wealthy human Thomas. Will the trip finally help her make up her mind, and separate the men from the fish?