As the heiress of the Lanhai Group, Chen Xinyi finds herself at the peak of her family's success when she mysteriously disappears, leaving her whereabouts unknown. This sudden event plunges the entire family into panic and chaos. To uncover the truth behind her sister's disappearance, her younger sister Chen Jingyao decides to take drastic measures. Through a sophisticated plastic surgery, she transforms herself to look almost identical to her sister Chen Xinyi and infiltrates the family under her sister's identity to conduct a secret investigation. As the investigation deepens, Chen Jingyao gradually discovers that her sister's disappearance was not a mere coincidence but entangled in a web of internal family power struggles, business conspiracies, and emotional entanglements. Facing the powerful forces behind the scenes, Chen Jingyao uses her intelligence and courage, maneuvering through the treacherous environment. She not only has to maintain her disguise without revealing any cracks but also outwit various factions to ultimately unveil the truth and seek justice for her sister, completing a thrilling revenge.