It started with a lousy introduction that was too ambitious on paper and then began to jump between one plot after another until the end. There was a desperate need for a better coherent structure and pacing. The characters were more or less fine but, despite being one of the most important characters, the ghost lacked a better characterization to make her role more impactful. The last 1-2 episodes were fundamentally bad, their main purpose was to lay down a handful of new elements for an imaginary sequel. This is a bad common practice streaming services have been pulling since forever to keep hold of the viewers attention regardless if they were planning for a sequel or not. The only acceptable scenario for such a practice is to have a direct sequel to follow it. Anyway, the drama was very mediocre Sci-Fi with a handful of failures.