Legend has it that Bristol Cove was once home to mermaids. Now, this coastal town has a mysterious new visitor in a girl named Ryn, who may just prove that all of the stories are true. Ryn catches the eye of local marine biologist Ben, and when he begins to show interest, fellow marine biologist Maddie becomes suspicious. Others in town, like deep sea fisherman Xander, are on a quest to discover the truth that is out there, and Helen, the town eccentric, knows more about the mysterious creatures than she lets on. The battle between man and sea takes a dangerous route as these predators seek to claim their birthright.
Sedale Threatt Jr.
The enchanting siren song takes hold of Ben and Decker; Dale must answer for the escalating crime in Bristol Cove.
Donna comes ashore with two other members of her colony to bring Ryn back home; when mermaids once again begin wreaking havoc throughout the town, Dale tries to put an end to it once and for all.
Bristol Cove mourns a loss, causing Ryn to experience a new human emotion.
Maddie rushes to Ryn's rescue after she is taken in for questioning; Ben and Xander return to the deep sea to search for answers, only to be met by an uninvited guest.
When Ben and Maddie attend his mother's fundraising gala, an unexpected guest shows up and offers to put an end to the overfishing that threatens the lives of the mermaids in Bristol Cove.
Ben begins to investigate some suspicious overfishing; Decker ramps up his efforts to find his escaped mermaid and shows the true extent of his influence.
The military facility goes on high alert; Chris manages to escape, but is not the only one who gets out.
Dale and the local police's investigation starts pointing directly to Ryn; Xander and Calvin's search for Chris heats up when they locate the nurse who works at the military bunker.
Ben and crew of The North Star uncover a device emitting a strange sound; Ryn finds shelter in the home of the local folklore expert.
The coastal town of Bristol Cove, once known for being home to mermaids, is turned upside down with the arrival of a mysterious girl.