Military doctor Su Tang traveled to Chongqing in 1942. When the scalpel fell, she was able to see the top-secret information in the patient's mind - contact codes, lurking lists, and Japanese secret messages, all appearing in the form of images and codes before her eyes. In order to hide this ability, she was forced to marry Shen Hanzhou, the military's most respected telecommunications expert, codenamed "Blue Bird". Husband and wife share the same bed, each with his own mission. She used the opportunity of visiting a doctor to steal information about his study, and he used the sound of radio waves in the middle of the night to test her authenticity. On the ruins of the Chongqing bombing, between the cheongsam and the bandage, faith and love secretly confront each other. It wasn't until she fell in a pool of blood that he screamed at the radio wave: "Blue Bird requests the red channel to connect - save my lover at all costs." At that moment, they realized that the person next to them was the comrade they had protected with their lives for eight years.
