I agree fully with the previous reviewer that the drama is a masterpiece with a remarkable depth. I watch it long time ago and is not able to give a detailed review. But what i remember most is when a drama taught you how to live better. Kdrama Discovery of Love teaches us how to love and this one is how to make a choice in life.
Zaizen is the apparent villian in the story. But his character is not just one dimensional. Though he strives to be promoted, his act is not totally bad like a typical villian. And he always make a decision with a seemingly justified reason. He is like a person who always steer a middle course, not doing things thoroughly out of moral but surely only to serve his ambition.
Satomi is on the hand, a righteous role, who always stick to the right side, even when it means a personal sacrify.
Which way do you prefer? Whether ends justify a not-so-correct means. This is always a delimma in our real life. The writer has his answer and is up to you to agree or not.
I earnestly urge IMDC to change the name into Great White Tower or many will miss this meaningful drama.