Top hacker Nine time-travels into a book, becoming Sang Wan, an illegitimate daughter of the Sang family sent to Xingfu Psychiatric Hospital. She feigns madness to save her life and meets Chu Wenyuan, a young master of the Chu family who is also biding his time and pretending to be crazy. A strategic marriage of convenience between the two families binds them together. A sudden fire breaks out in the psychiatric hospital, and the two escape the asylum to step into the treacherous and unpredictable Chu family mansion. While continuing to play the fool and disguise her secret identity, Sang Wan fights against elite family conspiracies, investigates her own background, avoids pursuit from dark web forces, and joins hands with Chu Wenyuan to counterattack step-by-step in the power struggles of the prestigious families.