Main plot, highlighting the story's strengths: China in 1920 is shrouded in turmoil. Shen Yan, a steady and reserved Communist Party member, holds fast to his beliefs amid the upheaval and secretly carries out revolutionary work. He moves among all kinds of factions, facing both the warlords' brutal suppression and internal disagreements and suspicion. Along this thorny path, he fights alongside those who share his convictions, while also enduring betrayal and sacrifice. Told in a realistic style, the story portrays Shen Yan's struggle and perseverance amid the currents of history, depicting the early Communists as they truly were in a complex political climate. It highlights the collision between ideals and reality and recreates both the hardships and the greatness of the revolutionary cause in that era.