In Suzhou City in 1941, watchmaker Zhou secretly guarded the "Lean Lean Watch Shop" on Guanqian Street, using gears and engine oil to isolate himself from the flames of war, until Liang Jingchun, an underground party member, came to the door with a jammed pocket watch - the watch movement hid the defense blueprints of the military factory, and also hid the fatal crisis of a Japanese raid. From the scratches of the word "work" on the inside of the pocket watch to the gear parameters of the bell tower clock, from the emergency hiding place in the store to the life and death escort of the canal awning boat, Zhou Tao, who originally just wanted to live a stable life, put down the tweezers in the toolbox in the face of national justice and picked up the information that conveyed hope. When Liang Jingchun was in danger to protect him, and when the "loyalty to serve the country" pocket watch burned through his fingertips, Zhou Tie finally understood: every gear in this troubled world should turn to protect the country, and the bell tower bell is a signal of resistance that will never go out in the dark night.
