The female lead accidentally travels through time to become the daughter of a disgraced official exiled to an island, immediately plunging into a perilous desperate situation at the start. Relying on her special water-controlling ability and extraordinary courage, she forages for food by beachcombing on the barren and desolate island, purifies water sources, and transforms saline-alkali mudflats, step by step breaking through the predicament. She and the iron-blooded male lead guarding the sea go from mutual probing to standing shoulder to shoulder, joining hands to deal with natural disasters and various hardships, carving out a path to survival in the desperate situation and supporting a peaceful world.