The story 'Black Dragon' is Part II of the trilogy 'Heroes of Shaolin'. The three young heroes, Flint, Bussie and Tobie, continue with their adventures into the world of 'River and Lake'. A dark force is enveloping the world of 'River and Lake', recognizable only by the imprint of a 'black dragon'. Very little is know about the Black Dragon sect as its leader remains anonymous, and its members infiltrate every segment of the society under assumed identities. The brutality and speedy expansion of the sect alarms the Brotherhood of River and Lake but they have been unable to counter this rising dark force.