Things are progressing with Mira and Nathan's relationship, although not nearly as quickly as Mira would like. If it were up to her, they'd be well on their way to making a family by now. But Nathan's traditional ways means Mira has to hold herself back. Not an easy ask for a siren.
Just as Mira's life seems to be heading in the right direction, her estranged father makes an unexpected appearance. When her father experiences strange memories surfacing, everything Mira believed about the powers of a siren's voice is thrown into doubt. A siren acquaintance from Mira's past reveals more about the mermaid world than Mira had ever been shown by her mother.