The plot is largely intense and suspenseful - full of plot twists and plotting / counter-plotting between the protagonists and antagonists. Each character is driven by their own sets of motivation, which makes them relatable, even though we might not agree with many of them. Each character plays important roles in the development of the drama.

However, my biggest gripe with this drama is with the ending. Even though the final episode is close to 2hours long, and the main story arc, of finding the true killer - is resolved, there are many other unresolved points (even though minor). For example, it is unclear how Mo Seok-Hee managed to maintain control of MC Group after everyone went to prison. After all, based on inheritance, her own shares are only slightly above 20% - and the total shares of her other family members would total to much more than 20%. After they are released from prison, Seok-Hee's position in MC Group is precarious. The other members could team-up and go against her with their combined shares.

It is also unclear if the "father" (Mo Chul-Hee) woke up from his coma. If so, did the "father" finally accept Seok-Hee into the family? Or does he still treat her with contempt. It is also unclear what the "father" would do with his own shares in MC Group.

What happened after 2 years when the stepmother and half-brother are released from prison? After all, before being arrested, the stepmother swore that she would never forgive Seok-Hee and that she would not be defeated so easily. Do they take revenge against Seok-Hee? Also, do they still stay in the family mansion? What is the relationship like between Seok-Hee and the stepmother and half-brother?