Taxi driver Ma Long comes from an ethnic family in a remote mountainous area. It is their ethnic tradition that young men and women must maintain absolute purity before marriage. When he fell in love with the beautiful and kind country girl Xiaofang, he was in danger of lifelong blindness due to corneal burns in a car accident. In order to help Ma Long recover as soon as possible, Xiaofang sacrificed her chastity to win a source of money to delay blindness for Ma Long, so that Ma Long's eyes could recover. Ma Long fell into deep contradiction and pain in the face of ethnic traditional concepts and his love for Xiaofang.