In the autumn of 1939, the neon lights in Shanghai's French Concession were still there. Shen Fang, a mute apprentice at a barber shop in the concession, uses electric current on his fingertips to send unspeakable information every night. When the Japanese army's "Night Owl" operation quietly unfolded, he had to use his voice to distinguish between comrades and ghosts between a razor, a radio and three suspicious customers.
