Hidden Duchess from the SeaEpisode 4

Island native Lia heads to Black Reef Harbor seeking treatment for her sick brother, only to be betrayed and have her identity stolen by her supposed friend Vera. With expert sailing skills, she enlists in the Black Tide Fleet and meets Duke Kane. Through shipwrecks and treasure quests, they uncover Vera's treachery, mend misunderstandings, guard their family, and fall in true love.