David, Snow and Regina work together to neutralise the threat of a mysterious new arrival. Belle turns to Hook for help hiding from Mr Gold, and Emma resumes her therapy sessions.
Lewis and Zane find an old myth about mermaids is true – the scent of ambergris sends them wild. But it backfires when sleazy Nate gets hold of the scent and has all three mermaid girls on his arm!
Emma meets Ash - a handsome horse riding instructor. A horse falls ill and Emma must use her powers to fix it. Lewis accidentally invites both Charlotte and Cleo to an awards dinner.
Ash comes close to finding out about Emma. Meanwhile, the girls discover that Charlotte’s grandmother was Gracie. Old wounds open up for Charlotte and she finds part of Max’s research: an old movie of Gracie – as a mermaid!
Emma thinks she’s going to get a promotion at the juice bar but Ash is given the job. Emma and Ash clash over the job, but we discover it’s over a lot more. Meanwhile, Lewis stands up to Charlotte over spending time with Cleo.
