On January 23, 2020, the 29th day of the twelfth lunar month, Wuhan announced a city lockdown. This film focuses on this special moment, with warmth and healing as the keynote, depicting the sincere and moving love of ordinary citizens. Courier Ayong (played by Huang Bo), rider Wu Ge (played by Jia Ling), piano teacher Ye Ziyang (played by Zhu Yilong), middle-aged couple Liu Yalan (played by Xu Fan) and Li Hongyu (played by Gao Yalin), retired doctor Xie Yongqin (played by Wu Yanshu) and restaurant owner Pei Ye (played by Xu Shaoxiong), intern nurse Xia Xiao (played by Zhou Dongyu), stranded passengers Zhang Zhe (played by Liu Haoran) and Junjun (played by Qiao Xin). Under the epidemic, love gave them the courage and strength to stand up. They used laughter as a shield and love as a spear to break through the bitter winter and fear and embraced bravely. Love spread under the fireworks of Wuhan, resisting all sufferings and finally witnessing miracles.