In the troubled times of Shanghai, the neon lights were dark, and literary and art worker Su Yufen used Pingtan as a shield to silently convey anti-Japanese information amidst the hustle and bustle of the big world. Unexpectedly, they reunited with Yang Liren, a comrade who was mistaken for a sacrifice. The two renewed their unfinished agreement and formed a defense team with Chen Mosheng and Xiaojiu. The sugar-painted spoon circulates secret codes, and the magic wand hides key clues. They help each other in the flames of war and save each other in desperate situations. From the farewell of life and death in Wusongkou to the reunion after peace, from the inheritance of the victims' relics to the rebirth of the big world, the friendships on the battlefield and the adherence to agreements one by one have accumulated over the years into the most touching legends of the era, witnessing the deep love of family and country in troubled times.
