During the troubled times of the Republic of China, deep in Taipingfang, Peking, a teahouse named "Yungui Tower" hid mysteries. On the surface it is a gathering place for ordinary merchants, but in fact it is the stronghold of a group of righteous warriors with unique skills. They used the copper box as a letter to help the people in danger, but when the Japanese army invaded China, they transformed from knights in the Jianghu to anti-Japanese warriors. The orphan Li Fu was rescued by them and witnessed how this group of people used their flesh and blood to light a spark in the dark night until the final sacrifice. This is a legend about protection, faith and inheritance in troubled times.
