A body washes ashore in the small fishing village of Orphelin Bay, inhabited by half siren/half humans known as Tidelanders.
After a 10-year prison sentence, Calliope "Cal" McTeer returns home to Orphelin Bay, where her brother Augie is dealing with a fisherman's murder.
Cal's near-drowning is noticed by the Tidelanders -- and by Corey. Adrielle gives Lamar and Dylan orders, while Rosa tries to tie up a loose end.
Bill's revelation leaves Cal reeling. Lamar and Violca continue to spy on Adrielle, who wants a prophecy she can trust and more money -- quickly.
Adrielle grants Cal permission to stay at L'Attente. Augie grows desperate to find a new buyer who isn't Gregori. The constables discover a corpse.
Violca gives Colton some shocking news, while Adrielle consults an expert to decipher the new shard. Cal confronts Dylan about his actions.
With Augie on the run from his crew, Cal returns to town, where Corey tells her the truth about what happened 10 years ago, which Rosa corroborates.
Tensions rise as Adrielle finalizes her deal with Gregori. When Bill tells her about the shards and his past, Cal vows to challenge the queen.