On the order of her father, the North Sea pirate princess Ye Lan disguised herself as the daughter of an envoy and went to the Donglin Kingdom to get married; on the night of her wedding, she went directly to the treasury through a secret passage as planned, hoping to steal the Dragon Vein Orb to break the curse of the Pirate Alliance; however, the entrance to the secret passage was ambushed in advance by Xiao Heng, the prince of Donglin, and Ye Lan was forced to use the marriage as a cover to travel around the palace; she discovered that there were secrets of the previous dynasty and an active volcano device hidden deep in the treasury, which would destroy both countries if triggered; Ye Lan chooses between stealing treasures and saving people, and goes from hostility to cooperation with the prince to uncover the lies of her father's generation; in the end, she gives up the orb, blows up the secret passage, and reshapes the order of the sea and land as a pirate princess; the whole story interweaves family hatred, national conspiracy and love redemption, with a tight rhythm and constant reversals.