The protagonist, female student Su Yao, deals with the turbulent situation with sobriety and reason beyond her age. Japanese military officer Yamamoto Ichiro intervenes in the Su family's life on the pretext of rescuing his father. The passionate pursuit under the elegant appearance creates a subtle tension with Su Yao's restrained gratitude. In order to obtain the strategic deployment of the Japanese army, she used every trick to act as a lady who knows how to repay her kindness.
Lin Xiao, an underground party member, opened the bloody curtain as a classmate and led Su Yao to witness the living laboratory behind the singing and dancing in the concession. The two women relayed information under the shadow of the sycamore tree.
In the life-and-death spy battle, the cyanide hidden in the piping of the cheongsam forms a fatal mirror image with the firearms in the kimono waistband. In the end, Su Yao and Lin Xiao walked hand in hand towards a bright future.
