The Waltz is a story about a broken heart police officer and a girl who is making a living by cheating rich men. The girl was working with a mysterious man called "A" and disguised herself by wearing a pink wig. He and the pink hair girl met at a noodle stall and started to enjoy chatting. The police officer who loves jazz music recently broke up with his girlfriend. One day, the pink-haired girl accidentally killed a gangster and realized it was planned by "A". Her mysterious partner revealed he was a killer and forced her to keep working with him. She wanted to stop doing such a thing, but didn't want to return to boring normal life. Finally, she asked the police officer for help.