First thing first: "Shadowless Sword" doesn't have much of a plot. Nothing much happens, which is pretty ridiculous considering it is a 2 hour movie. Basically, you could describe it as one long trek/chase sequence, periodically interrupted by the fight scenes, a la "Ice Age 2: The Meltdown" or the 2nd half of "The Island".
Having said that, the fight scenes are the main point of this movie, right? It is rare to see something new or original in martial arts movies, but here the filmmakers have a great eye for visually interesting fights. The backgrounds are gorgeous, and contribute a lot to the fights themselves. For instance, a lot of stuff breaks: pillars, tiles, and other objects all explode violently from destructive weapon swinging (think of the "Matrix" lobby scene but with swords instead of bullets). Roofs are there to enable aerial battle, and even being submersed underwater can't stop the sword fight from continuing!
Having said that, the fight scenes are the main point of this movie, right? It is rare to see something new or original in martial arts movies, but here the filmmakers have a great eye for visually interesting fights. The backgrounds are gorgeous, and contribute a lot to the fights themselves. For instance, a lot of stuff breaks: pillars, tiles, and other objects all explode violently from destructive weapon swinging (think of the "Matrix" lobby scene but with swords instead of bullets). Roofs are there to enable aerial battle, and even being submersed underwater can't stop the sword fight from continuing!