

Quinn Thorne, a club waiter, accidentally rescued Sera Dutt when she was drugged. Quinn is mistaken for an antidote by Sera, who takes half of his necklace jades as a token. Six years later, Quinn works at a Dutt Group construction site to fund his foster mother's medical bills. Mocked by coworkers for being single, he encounters Sera and her daughter, Lila, who calls him "Dad" after recognizing his matching necklace.

The second princess Aella of Therasia was exiled to the North by her father. She awakened the Azure Phoenix Flame Power in Blackstone Gorge, which inherently restrains the Wights. Fighting alongside Northern Lord Reyne, she rose from an outcast princess to Supreme Queen of Ancient Valyria. When the southern nobles who once wronged her saw her again at the Sacred Court, Aella, robed in black and gold and wearing the Thorned Dragon-Nest Crown, looked down on all as a queen.

In her previous life, Serena, the Golden-Tailed Princess of Atlantis, was betrayed and murdered by her adopted sister, Lina, and her fiancé, Kaelen. Reborn with the memories of her past, she sees through their schemes and, to escape her doomed fate, ventures into the Abyss, where she bonds with the ancient Sea God Nereus, who has long been sealed away. Their union leaves her carrying nine divine eggs. At the Birthing Ceremony, Serena exposes the villains' conspiracy and joins forces with Nereus to defeat them. Together, they abolish the merfolk tail-caste system, and Serena ascends as the Sea Queen, ruling the deep sea alongside the Sea God.