On the beautiful Kinmen Island, Cai Jiwu (played by Wu Zhongtian), Huang Xingjun (played by Chen Yihan) and A Jin are three childhood friends. Awu and A Jin have the same unspeakable feelings for Xingjun, and they are both afraid of breaking this beautiful friendship. Awu, who is determined to inherit the culture of Kinmen, also has a knot in his heart that is worried that Xingjun and A Jin will leave the island. Xingjun's sister Deyue (played by Yang Guimei) had an unfinished love affair with an officer stationed in Kinmen when she was young. Deyue was hurt so deeply that she can no longer accept men. Xingjun, who is known as the "Gongtang Xishi", is now also the object of the attention of the soldiers stationed on the island. Soldier Zhang Hanwei pursues Xingjun and joins the literature and history studio hosted by Awu as a volunteer. Zhang Hanwei's persistence makes Xingjun loosen up, but this relationship makes Xingjun's family and friends feel threatened at the same time...