The plot is the same as the game its based on : "Tekken 3". As such, the story is straight forward and can be boring to some viewers. However, if you're a tekken fan, you'll find the animation is brilliant and the moves displayed are basically the same as the one you do when you mindlessly press the button while playing Tekken.
I need to warn you though, the english dub is a massacre, just watch it with the japanese dub. The voices match the ones in-game and it feels refreshing. Furthermore, the voice-acting on the english version is mediocre to say the least.
Overall, the show is enjoyable and a real dive into the state of mind of Jin Kazama.