Mysterious Lotus Casebook is a dark 江湖/jiānghú story about the ultimately futile aspirations and obsessions of the martial world. In an epic battle for supremacy, Di Feisheng of the dark Jinyuan Alliance challenges Li Xiangyi, the leader of the righteous Sigu sect. Both men disappear from the martial world afterwards, leaving a vacuum at the top and their sects in disarray.

Ten years later, aspiring young detective Fang Duobing comes across Li Lianhua, a famous itinerant doctor whom he is convinced is a quack. Determined to expose him, he attaches himself to Li Lianhua as inextricably as a wad of chewing gum in his hair. They run into Di Feisheng, who immediately recognises in him his old nemesis Li Xiangyi. The two old rivals remorselessly keep Fang Duobing in the dark as they try to figure out who sabotaged their fight and search for Li Xiangyi's deceased sect brother Shan Gudao's corpse. An unlikely friendship develops as they work together to solve a series of strangely connected jiānghú cases.

Plot wise, this drama is solid but dry and unremarkable. The cases all unfold at a fast pace and are easy to follow, but do not engage audience participation. They are simply plants for clues to a treasure hunt for artefacts that unlock the main conspiracy. Despite a hint of the supernatural, the cases fall short of chilling or suspenseful. The hidden mastermind behind the main conspiracy is pretty obvious and revealed fairly early on, and even the ironic twist at the end is not much of a surprise. Both villains are one-dimensional jiānghú archetypes driven by vanity and delusions of grandeur. Wang Herun's scarily convincing portrayal of the Saintess of the insane cackle elevated the role beyond its one-dimensional character blueprint.

\What makes this drama a success are fascinating main character designs, strong rapport among the three leads, the scintillating dialogues, and well-choreographed and exciting action sequences. The real mystery is about who Li Xiangyi was and why he was killed. The answers are at surface trivial. Li Xiangyi was perched at the top of the martial arts world as the world's best swordsman and leader of the righteous sects. This made him the envy and natural target of virtually everyone. However, Li Xiangyi was far from the perfect hero of Fang Doubing's idealistic imagination. In fact, he was a self-absorbed, pompous ass who believed the universe revolved around him and his worldview. His swordsmanship is matched by a brilliant, cynical mind and a razor-sharp tongue that, according to poor Ai'man, can slay a person with a few words. If there is one thing lacking in Cheng Yi's otherwise stellar performance, it is that his Xiangyi is too empathetic. This masks his many flaws and hides how insufferable and difficult he was as a person. It took me awhile to realise that his sect had some inkling who Li Lianhua really was but they refused to recognise him because they just did not want Li Xiangyi to come back.

As for Li Lianhua, he is just a shard, a detached, sickly, disillusioned and world-weary remnant of the glorious Li Xiangyi. Cheng Yi really compels with his heart rending expression of this facet of the character singing his swan song without a shred of self pity. I lived for the sudden bursts of energy or sheer willpower that momentarily revives the breathtaking, dazzling and dizzying swordsmanship that propelled Li Xiangyi to dominate wuling. Only to all too rapidly diminish back into Li Lianhua again, a wickedly unapolagetic compulsive liar whose mantra is clearly, "Ask me no questions, and I'll tell you no lies." This is how he keeps everyone, and especially the hapless Fang Doubing, at arm's length; to avoid new personal entanglements. Fang Doubing (which literally means "sickly") is a parody character, the typical naive, high-minded, young adventurer raring to make a difference in the martial world. The dialogue is well written and humorously illustrates how grudgingly Li Lianhua is moved by this pesty young detective and tacitly accepts him as his successor. However, this kind of clichéd relationship dynamic of the clueless sidekick that elevates the brilliant sleuth is too common and quickly becomes boring. Li Lianhua's lies to Fang Doubing went on for too long to the point it became cruel and unnecessary. Their relationship is over explored and shortchanges the more interesting relationship in the drama.

What disappoints me most is that the writers opted to very cursorily explore the more complex and interesting relationship between Di Feisheng and Li Lianhua. Di Feisheng is the most layered villain in this story; that rare antagonist who transforms into a protagonist. Like Li Xiangyi, he rises to the top of his sect through sheer martial prowess rather than by winning hearts and minds. They are enemies who become friends, both betrayed and searching for answers. But his story is sidelined for much of the drama, his backstory is rushed, and his relationship with Li Lianhua does not really get a chance to develop and grow. Yet the best moments of this drama, are when all three of them are together, like a found family.

I like that this ends with an action-packed finale and satisfying final confrontations with the antagonists. But as for the plot, the best reveal is when Fang Doubing figures out who Li Lianhua is, which isn't really a revelation to the viewer. And I can't really pinpoint when the plot reaches its climax, as none of the high points make a strong impression. As for the ending, it is fitting but not as definitive as I would have liked. Most of Li Lianhua's journey is about putting his affairs in order and offering closure to those he cared for; to help them move on from Li Xiangyi who in all the ways that mattered died ten years ago. Yet Li Lianhua continues to string poor Fang Doubing (and us) along, which is too cruel and inconsistent with the drama's core message about letting go of past attachments and moving on. These kinds of endings that try to please all audiences really annoy me. I still enjoyed this superbly well written drama, immensely even though I think it had the potential to be much better. For me, this is an excellent 8.5/10.0 and a highly recommended watch.