故事建构在两个互为镜像，生死同命的平行世界中，元界的念阳枭为救心上人空灵慧，穿越到易界苦寻欲刺杀空灵慧的凶手，然而易界里两人竟是仇敌关系，空灵慧一心要致念阳枭于死地，与此同时，神秘的少女永儿、风流的街头小混混、冷面警官诺顿等人相继出现，伴随着一个个错综复杂的案情，而念阳枭的卷入又使案件更为扑朔迷离，一场悬疑烧脑又热血奇幻的异时空冒险就在《画江湖之换世门生》展开。

The story took place in two parallel universes named Yuan and Yi, where people shared the same life and death. Nian Yangxiao, came from the Yuan World to save his true love Kong Linghui, crossed the border to the Yi World in search of the killer who assassinated his love. In the Yi World, however, he and Kong Linghui were enemies. Kong Linghui tried everything to kill him. At the same time, the mysterious girl Yong'er, the romantic street gangster, the cold-faced police officer Nuo Dun and others appeared one after another, each accompanied with a complex case. The involvement of Nian Yangxiao made the cases more complicated and confusing. A suspenseful, thrilling, blood-burning and fantastic adventure in different time and space was launched in "A Portrait of Jianghu: Double Life".