Poverty-stricken Hwa-yeon decides to offer herself up as one of the king’s concubines. But once inside the royal palace, her life becomes a riveting quest for survival as two men become wildly obsessed with her. On one side is the Grand Prince Seong-won, a megalomaniacal ruler drunk with power and lust; and on the other, Kwon-yoo, who has everything to lose if his desire for Hwa-yeon is exposed. As action and political intrigue infiltrate this daring love triangle, the king’s palace becomes a hellish prison – filled with overwhelming passion and obsession that these three troubled souls will be lucky to escape from.