"The King's Daughter" is a fantasy-adventure film set in the 17th century, directed by Sean McNamara. The story follows King Louis XIV of France, who seeks the mythical powers of a mermaid in order to prolong his life. He tasks his trusted explorer, Robert Grebe, with the mission to capture a mermaid and harness her powers. However, when Grebe encounters a mermaid named Lenore, he begins to question his mission and develops feelings for her. As Grebe grapples with his loyalty to the king and his