Mermaid mother is framed as a homewrecker by the Sea King's son's fiancée, and suffers cruel torture including having her scales scraped off, her tail broken, and miscarriage. When the truth comes to light, the vicious fiancée pays a bitter price.
Frank, now King of the Deep, returns to save his mother frozen by his father Poseidon 20 years ago for protecting him. He confronts Poseidon over the throne, while Kate excitedly prepares to marry Frank, only to be stunned by news of his infidelity, sparking intense underwater drama.
Kate has always trusted Frank, who once rejected all other mermaids to court her and showered her with treasures. But shocking news arrives: Frank has another woman who's pregnant. She confronts him, only to be hung up on, sparking her worst fears about their once-idyllic love.
Frank’s mom prepares the legendary Heart of the Deep as a gift for Kate, but Kate’s mother mistakenly thinks Frank gave the family heirloom to a mistress, fueling her rage. When Kate hears a 'mistress' took her wedding bedroom, she vows to confront her, while Frank’s mom settles in, unaware of the brewing conflict.
Furious at finding Selena in her wedding room carrying a child, Kate accuses her of being fiancé Frank's mistress, dismissing her pleas and ordering punishment. Just as tensions peak, Selena drops a bombshell—she's Frank's mother, Selena the Mother of the Deep.
A mermaid is harshly labeled a cheap mistress by Frank's mother, who dismisses her claim of being Frank's biological mom and Poseidon's wife. Mocked for her tale of being sealed in ice by Poseidon for 20 years, her danger spikes when tests confirm her baby holds the Spirit of the Deep, threatening both their lives.
As the grand wedding banquet of Frank, King of the Deep, and Kate starts with ocean-wide celebrations, Kate seizes a woman she claims is Frank's pregnant mistress. She vows to expose the woman before all marine nobles, while the desperate woman pleads for help, igniting intense dramatic suspense.
A woman is wrongly accused of being Frank's mistress and assaulted by Kate's sister. She shocks everyone by revealing she's Frank's pregnant mother carrying his sister, sparking a fierce fight. Her pearl necklace later exposes her as the Mother of the Deep, delivering a thrilling twist.
The mermaid is wrongly accused of being Frank's mistress. Kate, claiming to be Frank's fiancée and future Mother of the Deep, snatches the family heirloom and forces the mermaid to drink lethal poison ink to eliminate her and her unborn baby, while her desperate cries for help go unnoticed.
Vicious Kate ties up the mermaid, framing her as a mistress, and orders her thrown into the Frozen Cage to be devoured by piranhas. She boasts Frank will thank her for helping him hold the throne, but the mermaid swears double revenge as the Mother of the Deep.
Furious Kate confronts her fiancé Frank, accusing him of hiding a pregnant mistress and claiming she’s dealt with the 'problem'. Frank is bewildered and denies all charges, while Kate’s family joins the rage, sparking a tense, mysterious clash full of misunderstanding.
A heated confrontation ignites when the fiancée accuses King Frank of the Deep of cheating, demanding half his family’s fortune. Frank vehemently denies the claim, but she presents the rare Heart of the Deep necklace as irrefutable proof, leaving him shocked and desperate to uncover how she obtained it.
Fiancée Kate furiously confronts Frank, accusing him of gifting their love token—the family heirloom Heart of the Deep—to another pregnant woman. Frank dismisses her as ridiculous and demands his mom be brought, while Kate warns he’ll never see that woman again, claiming she got what she deserved.
Engaged couple erupts in a furious fight over an alleged affair, with the groom threatening to call off their wedding. Pressured by her family to secure the marriage and half his fortune, Kate backs down—while the groom orders a frantic palace-wide search for the missing Lady Selena.
In this explosive opening scene, a man fiercely defends a woman wearing a mysterious necklace, enraging his fiance Kate. Consumed by jealousy and a sense of being disrespected, Kate threatens to destroy the necklace and acts on her threat, only to uncover it’s the Heart of the Deep—a symbol of ocean power and the man’s late mother’s precious heirloom, igniting a brutal, emotional conflict.
In a heated clash, a man confronts someone who harmed the pregnant Selena. The culprit brazenly admits to killing her unborn child, insults Selena as a homewrecker with no remorse. Filled with rage, the man demands to know Selena's whereabouts, crafting an intensely gripping scene full of raw emotion.
Frank flies into a rage, attempting to hurt Kate—only for others to beg him to stop, revealing mistress Selena has fled and Kate is innocent. They capture a sailfish who knows the truth, while a child’s desperate cries for mom amplify the tension and unresolved mystery.
A shocking revelation unfolds: the woman everyone mocked is actually the Mother of the Deep. Devastated by his unborn sister's death and enraged by those who hurt his mother, Frank issues a ruthless vow that every one of them will pay in blood, igniting intense, thrilling conflict.
When the ruler's mother is gravely injured, he flies into a rage, ordering the realm's finest healer to treat her. He then threatens everyone in the hall: if no one reveals who harmed his mother, he will slaughter them one by one while counting down from three, building intense tension that hooks viewers.
Tensions flare as Frank confronts Kate and Seth over the harm inflicted on Selena. In a desperate bid to save himself, Seth betrays Kate, revealing her jealousy-driven crimes: whipping Selena with an electric eel whip and plotting to poison her unborn baby with toxic ink.
Fueled by rage over his mother’s suffering, Frank confronts his fiancee Kate. Desperate to evade punishment, Kate shifts all blame to her mother, admitting she was forced to frame Selena as Frank’s mistress and torture the innocent woman.