"Unless a Taein capable of conceiving the White Tiger's heir is installed as king, a seven-year famine will befall the land."

In Hana, a kingdom bordering the desolate Lands of Ignorance where monsters roam, an ancient, unspoken law governs the throne: Any Taein born to carry the seed of the protective White Tiger must be crowned King.

For decades, no Taein has appeared—until Iro, born a mere slave in a high official's home, manifests as the next Vessel.

The former King is forced to abdicate, and the Crown Prince, Jangun, is demoted to Iro's attendant, the U-gwan (Royal Guardian).

Everyone in the palace knows the horrifying truth: Iro cannot escape death once he turns twenty and produces the required heir.

In the midst of this tightrope walk of tension, Iro gives his heart to Jangun.

Soon, Iro reaches his twentieth year and finally meets the majestic Baekho, Geonyu, who has come for the sole purpose of securing his lineage...

The White Tiger, Geonyu, seeks a heir to gain his freedom and leave the mortal world. Iro, the Taein King, is destined to be murdered after conceiving the heir. And caught in the middle is Jangun, the dethroned prince and faithful guardian.

In the beautiful yet twisted kingdom of Hana, where will this love, obsession, and desperation among three men lead?