In the 1920s, during the White Terror, the whole city was blocked. Li Yimin (played by Wang Yuan) was ordered to escort important people to evacuate secretly. But at this time, the organization was severely damaged, isolated and helpless, and it was difficult to move forward. Li Yimin decided to seek help secretly. Along the way, he met his teacher Hou Shaolie (played by Li Chen), his co-worker Zhang Guisheng (played by Yin Xiaotian), his classmate Ding Menghua (played by Zhang Xueying), Xu Tianping (played by Liang Jingkang), Jiang Yue (played by Cisha), Luo Shiwen (played by Zhai Xiaowen), Zhou Wensu (played by Li Jiaxin) and other old friends who had already embarked on different life paths. Who is worthy of trust? The "Lone Star Squad" assembled again. The evacuation plan that was thought to be carefully laid out had already been shrouded in the enemy's net. The moment of evacuation was imminent. Can leaving the last bullet for yourself win a glimmer of hope?