In a small pharmacy in the water town of Jiangnan, the shopkeeper unexpectedly discovers and saves a badly wounded traveler who is being hunted by pursuers. Guided by her compassion as a healer, she risks her own safety to nurse him back to health. As they spend time together, she gradually discovers that he is the descendant of a loyal and upright family framed by treacherous officials. Driven by her sense of justice, she resolutely leaves behind her peaceful life and accompanies him on a perilous journey to the capital. Along the way, they join forces to evade repeated ambushes, contact loyal officials, and gather evidence of the crimes. Finally, they expose the treacherous officials' heinous crimes of colluding with the enemy and betraying their country before the imperial court, restoring justice to the innocent, wronged family. Just when success and recognition seem within reach, he turns down prestigious positions and generous rewards, choosing instead to return to a small town in Jiangnan and tend the pharmacy together with her.