Ryn and her folk fight for their lives against Katrina. Maddie finds out a huge secret.
Ryn learns about motherhood on land. Xander juggles his personal life and his secrets.
Ryn's child is about to be born
Ryn discovers a major secret
Ted's obsession puts him in danger. Ryn and Tia experience a violent difference in opinion.
Ryn's life is somewhat normal. But another woman of the sea appears in Bristol Cove to change all that.
Ben must make a tough moral decision to help save Ryn, and it has far reaching consequences.
Ben must put aside his jealousy in order for Ryn to mate.
Nicole helps Ben and Maddie research the siren song appropriately. Other discoveries come to light.
Ryn returns to Ben and Maddie. The thrupple must learn to trust an outsider.
Ben and the mermaid enact a plan to ruin the oil company's plans. But nothing goes as expected.
Katrina is fighting to take back the merclan, while Ryn is helping Maddie fight for her mother Susan's safety.