法国女留学生埃尔莎(刘亦菲 饰)在成都爱上了丝绸研究员、尺八高手马荣(黎明 饰),后又在巴黎与马荣的兄弟、纹身师建民(刘烨 饰)之间产生情感。前者找到了一种符合他理想的蚕——夜孔雀,后者把蝶化的夜孔雀永远铭刻在艾尔莎的肌肤上。French female student Elsa fell in love with silk researcher, shakuhachi master Mayon, and later in Paris with Mayon's brother who built tattoos to generate emotion between people. The former found a line with his ideal silkworm - night peacock, which the peacock butterfly of the night is forever attached in the skin Elsa.