This book offers a unique triptych: the historical story of Pei Xing (ninth century) which inspired the film The Assassin, the original script (written by Chu Tien-wen, A Cheng and Hsieh Hai-meng) and most of all "Nuages mouvants" written by Hsieh Hai-meng, the youngest writer, the chronicle about the script from the preparation to the filming. Hsieh Hai-meng is a strong and original personality of the Taiwanese literary scene, which has in part inspired the heroine of the film, a rebellious judge who struggles against tyrants in ninth-century China.