Based on the Siren Tv Show.

Legend has it that Bristol Cove was once home to mermaids. Now, this coastal town has a mysterious new female visitor named Ryn Fisher, who may just prove that all of the stories are true. The battle between man and sea takes a dangerous route as these predators seek to claim their birthright, but life isn't as easy as explained. These "mermaids" aren't mermaids. They are sirens, brutal killers of the sea, and they hate humans.

Information via Google.