The Beast King's Secret Siren poster

The Beast King's Secret Siren

9 episodes, from MoboReels

Episodes 9

On the surface, the floating city of Navia rules a blackened ocean. Beneath the waves lies Nerathis, bound by a five-hundred-year-old tribute: every year, human girls are dragged into the deep and offered to the Leviathan, a colossal beast chained in the Abyssal Vault. Ayla is the latest tribute. Her younger sister Emery refuses to let her go alone—disguising herself as a boy and posing as the Navian prince, she descends into the deep to rescue her. But the beast does not want Ayla. When the Leviathan senses Emery, it does not rage. It responds. For five hundred years it has ignored every tribute. It has been waiting. Emery carries the blood of the Sirens, the royal sea race believed extinct since the Great Flood—and her heartbeat resonates with the caged king. Between its scales, human green eyes open: Damon, once king of Nerathis, half-turned into a monster after humans butchered his family. The regent Zane has kept him imprisoned, drawing his bloodline to fuel his tyrannical rule. But the deeper their bond grows, the more Emery has to lose—and the court is watching.

Quick facts

Episodes
9
Made by
MoboReels
Official app
MoboReels
Language
English
Genres
Royal, Power Struggle, Dragon, Western Fantasy
Added here
8 November 2026

Where can I watch The Beast King's Secret Siren for free?

Right here. Press Play and DramaSpot opens it in your browser, no download or account, with the video coming from MoboReels.

How many episodes does The Beast King's Secret Siren have?

9 episodes in total.

Is The Beast King's Secret Siren one film or several episodes?

Several short episodes rather than a single film. They run back to back here, so you can sit through the whole story in one go as if it were a movie.

Is the MoboReels app required for The Beast King's Secret Siren?

Not at all. Any phone or computer browser will do, with nothing to install and nothing to sign up for.

How does The Beast King's Secret Siren compare in length?

It runs longer than 45% of the 1,703 MoboReels dramas we list.

What genre is The Beast King's Secret Siren?

We file it under Palace and royalty, and 4,051 dramas on DramaSpot share the Palace and royalty label.

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