The Mermaid Princess They Betrayed
Princess Ella, a mermaid, possesses the mystical power to sense the Black Tide, yet the royal family regards her merely as a tool to guard their secrets. She is deeply in love with her fiancé Cedric and once sacrificed her life to save him. But on the eve of their wedding, she discovers Cedric has been misled by her younger sister Vivian. Not only does he betray her, but Vivian also pushes Ella into the deadly Black Tide. Trapped in mortal peril, Ella is rescued by Ronan, the Black‑Sailed Pirate King. This man, whom she once saved by chance, takes her away from the cold royal palace and grants her freedom for the very first time. As the two venture deep into the Black Tide to uncover the truth, Ella stumbles upon a staggering conspiracy concealed by the mermaid royal family to manipulate the seas. Plagued with regret after losing Ella, Cedric is too late. The mermaid princess who was once sacrificed has fully awakened. She commands the Black Tide, leads the pirate fleet, and exposes the royal family’s lies. From a manipulated pawn, she rises to become the Queen of the Black Tide who holds the ocean’s fate in her hands.
Story Guide
Episode 1
Cedric means to prove he's worthy of the throne by facing the Black Tide on his wedding day. Everyone warns him the current is deadly — countless ships have vanished inside it — but he shrugs it off as a tiny whirlpool. When the tide surges out of control, Ella dives in to pull him back from drowning. She gets him to safety, and that's exactly when her younger sister Vivian makes her move, claiming Cedric's rescue as her own. Cedric wakes believing the wrong sister saved him — and the credit, and his heart, slip away from Ella.
Episode 2
Aboard his ship, the Black-Sailed Pirate King Ronan presses on toward the Mermaid Kingdom, chasing a legend about a fountain of youth. The Black Tide hits without warning, the helm won't answer, and his crew braces for the worst. Just as it looks finished, someone pulls him from the water — a woman kissing him beneath the waves so he can breathe. He surfaces certain he was dreaming, until a single word lands: mermaid. The man Ella once saved by chance has just been saved by her in return.
Episode 3
The palace demands answers for why the Black Tide surged during the wedding. The account given is that Ella abandoned Cedric to rescue humans, that she lost control and endangered everyone, and that Cedric crossed the safety boundary himself. Ella says she carried Cedric back to the reef — but Vivian was the one there when he woke. For rescuing pirates without permission, Ella is confined until the wedding can be held again. Meanwhile, a potion that lets a human breathe underwater for one hour is prepared, and a question hangs in the air: who is she?
Episode 4
At the palace, Vivian wastes no time claiming the mermaid who rescued a pirate was her — never mind that her sister took the blame and the punishment. She warns that breaking in carries severe consequences, and a token and a message are left behind: the rescuer is owed a debt. Back in confinement, the truth claws at Cedric. Vivian shows a wound she says she got protecting him from the black reef, but it mirrors Ella's own injury — copied, Ella says, to frame her. Cedric demands an apology. Ella refuses, and the cell door stays shut.
Episode 5
A pirate has breached the palace, and the evidence points straight at Ella. Vivian seizes the opening, claiming she saw a red-haired princess embracing a human — knowing full well there are two red-haired princesses in the palace. When Ella turns the accusation back on her, Vivian deflects: why would she hand over the badge if she were guilty? The order comes down anyway — take Ella to the coral prison. Vivian presses her advantage, asking whether she could take her sister's place if Ella ever betrays him. Is Ella still in his heart? This is their time.
Episode 6
Ella says she'll come explain everything tomorrow, but tomorrow never arrives. Vivian appears at the cell instead, announcing she's been sent to bring Ella to the tide platform for one last hearing. Ella says she has nothing left to say to him — until Vivian twists the knife, asking if she doesn't want to know why he chose her. Then the truth lands: Cedric was never coming. He left something in Vivian's bed, and Vivian makes her claim plain — everyone always noticed only Ella, but now Cedric loves her, and the wedding and the title will be hers. Ella answers that anything won through lies was never truly hers.
Episode 7
On the tide platform, the account given is that Ella tried to hurt her sister and that Vivian only tried to save her. The verdict is delivered coldly: Princess Ella has fallen into the Black Tide passage, and no one has ever returned from it. Cedric stands there with his hand aching, asking whether Ella will be all right. Then a lookout spots a pirate ship on the water — and a figure swept into the tide. For a moment, someone wonders if it's her.
Episode 8
Ronan pulls Ella from the Black Tide — the mermaid he never forgot, the one who saved him once. He shields her, telling her he finally got the chance to repay the debt. She gives her name: Ella. Then the Mermaid Kingdom's people board the ship, and Cedric finds her alive, demanding she return and face judgment. Ella throws his betrayal back at him — she nearly died, and he still believes Vivian. But doubt finally cracks his certainty: Ronan's arm was already wounded when Ella saved him, so how could Vivian have been hurt before that?
If you've been waiting for the moment the tide finally turns, this is the one to press play on — keep watching.
Cast
- Ella — Mermaid princess who can sense the Black Tide; betrayed by her fiancé and sister
- Cedric — Prince and Ella's fiancé; misled by Vivian into betraying Ella
- Vivian — Ella's younger sister; manipulates Cedric and pushes Ella into the Black Tide
- Ronan — Black-Sailed Pirate King; rescued by Ella and later rescues her
FAQ
Who is Ella in The Mermaid Princess They Betrayed?
Ella is a mermaid princess who can sense the Black Tide. She is engaged to Cedric, and on their wedding day she dives into the Black Tide to save him from drowning. Later, she is betrayed by her fiancé and her younger sister Vivian, and she is rescued by Ronan, the Black-Sailed Pirate King.
Who is Vivian and what does she do to Ella?
Vivian is Ella's younger sister. She claims Cedric's rescue as her own after Ella pulls him from the Black Tide, and Cedric wakes believing the wrong sister saved him. Vivian also claims she was the mermaid who rescued a pirate, shows a wound she says she got protecting Cedric that mirrors Ella's own injury, and tells Ella that Cedric was never coming to see her and that the wedding and title will be hers.
Who is Ronan in The Mermaid Princess They Betrayed?
Ronan is the Black-Sailed Pirate King. He sails toward the Mermaid Kingdom chasing a legend about a fountain of youth, and when the Black Tide hits his ship, a woman pulls him from the water and kisses him beneath the waves so he can breathe. Later, Ronan pulls Ella from the Black Tide, shielding her and telling her he finally got the chance to repay the debt.
Why does Cedric believe Vivian saved him instead of Ella?
Ella dives into the Black Tide and pulls Cedric back from drowning, getting him to safety. That is exactly when Vivian makes her move, claiming Cedric's rescue as her own. Cedric wakes believing the wrong sister saved him, and the credit and his heart slip away from Ella.
What is the Black Tide and why is it dangerous?
The Black Tide is a deadly current that surges out of control. Everyone warns Cedric the current is deadly and that countless ships have vanished inside it, though he shrugs it off as a tiny whirlpool. It also hits Ronan's ship without warning, leaving the helm unresponsive. The verdict later states that Princess Ella has fallen into the Black Tide passage, and no one has ever returned from it.
What happens to Ella at the tide platform?
On the tide platform, the account given is that Ella tried to hurt her sister and that Vivian only tried to save her. The verdict is delivered coldly: Princess Ella has fallen into the Black Tide passage, and no one has ever returned from it. Cedric stands there with his hand aching, asking whether Ella will be all right.
Is The Mermaid Princess They Betrayed worth watching?
If you have been waiting for the moment the tide finally turns, this is the one to press play on. The story follows a mermaid princess betrayed by her fiancé and sister on her wedding eve, rescued by the pirate king she once saved, as she uncovers a royal conspiracy.
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