Version 1 (Plot-focused)
Mara, a fisherwoman, loses her daughter in a shipwreck and is sold into an underground den of evil after being framed by her sister's husband. At a moment of life-or-death peril, she inadvertently summons Dorian, the Underworld King, who is living incognito. To secretly investigate a rebellion, Dorian disguises himself as a humble blacksmith and enters into a marriage contract with Mara. Amidst aristocratic scorn, family conspiracies, and power struggles, Mara rises from a destitute commoner to become a Queen standing proudly beside the Underworld King, ultimately uncovering the truth behind her daughter's disappearance and the kingdom's dark plots.
Version 2 (Romance-focused)
Having lost both her husband and daughter, Mara believed she would never find happiness again—until she rescues a little girl and crosses paths with Dorian, the Underworld King disguised as a blacksmith. One hiding his true identity, the other bearing deep emotional scars, the two gradually fall in love as they share their daily lives. As divine authority, the throne, and war close in, Dorian must choose between his royal duty and the woman he loves, while Mara is destined to become the one who alters the fate of the Underworld.
Version 3 (Underdog-to-Powerhouse)
Everyone looks down on Mara, a humble fishmonger. Nobles humiliate her, her brother-in-law frames her, villains sell her into an underground dungeon, and she is even mocked for being too poor to afford a formal gown. Yet, no one knows that the impoverished blacksmith she married is actually the supreme ruler of the entire Underworld. As his true identity is revealed, those who once trampled on her dignity will be forced to kneel before her, paying the price for their arrogance.
Version 4 (Suspense/Mystery)
An anomaly in the River Styx unleashes monsters upon the world, and dark undercurrents surge through the Underworld. Dorian, the Underworld King, has gone undercover among the common folk to investigate a rebellion, but his destiny is forever altered by a kind fisherwoman named Mara. As the mysteries of the missing daughter, royal traitors, a sinister "Black Tide," and the struggle for power in the Underworld come to light, the two discover that their meeting was no accident—it was a fated arrangement destined to rewrite the future of the entire Underworld.