When she woke up in the hospital, she couldn't remember who she was or what had happened. Everyone told her that her name was Jiang Zijun, the younger daughter of Hong Kong hotel magnate Jiang Zhihong, and that she had a smart, handsome older brother, Jiang Ziming. But little by little, things began to feel wrong: her brother Jiang Ziming kept arguing with her for no apparent reason, only to make up again; Gu Jiayang, whom she met for the first time at a party, seemed as if he had known her for ages; and a girl at a restaurant, a complete stranger, behaved strangely... Everything seemed like a mystery waiting for her to unravel, one step at a time...