A tsunami suddenly strikes the coast, and fishing village girl Xia Tinglan rescues Gu Chengyue, chairman of the Gu Hai Group, at a critical moment. An accidental discovery leads an old wrist tag numbered "0719" to uncover the secret of a birth origin from twenty years ago. As the investigation deepens, she steps from an ordinary fisherwoman into the wealthy elite and the workplace step by step, proving herself through sheer ability amidst cold-chain crises, identity doubts, and heavy misunderstandings. Until two paternity tests are revealed at the same time, everyone's fate is completely rewritten, and the truth that has been hidden for twenty years finally surfaces.