On the surface, she is Qu Chunying, the dancing queen of Shanghai Paramount who confuses all living beings. The buttons of her cheongsam hide a secret. She maneuvered among high-ranking Japanese and puppet officials, conveying top-secret information with graceful dancing. When her childhood sweetheart Shen Si transforms into a treasonous agent codenamed "Night Owl" and approaches with a deadly list, she must make a decision within forty-eight hours. Old love is like a lock, family and country are like mountains, and every dance step is on the edge of a knife.
