Happy and carefree, Chang-soo and Yunhwa, two young Korean newlyweds are on their honeymoon in Paris. Strolling in Pigalle, in a shop window, a red dress draws Yunhwa's attention, she enters. Chang-soo goes to buy cigarettes.
When the young man comes back Yunhwa has disappeared. Not speaking a word of French he desperately searches for her. A research that will turn into a descent into hell, a free fall into a world ruled by illegality, prostitution, drugs, a universe with its own codes and punishments.