Firstly, the editing is very professional, the filming locations and rooms were perfectly chosen and the special effects are well-done. The female lead acted perfectly like two different people. The plot is gripping and well-written, it's obvious that a lot of effort was put into it.

On the other hand, the worst thing is the over-complication of the plot. There is one twist too many in this drama, everytime I started getting invested in the characters and their overall situation, it suddenly switched to another dynamic. In consequence, I lost the attachement I formed and ended up not caring about the characters as much as I could have done. Particularly the two main leads, whom I disliked more than I liked.

The main leads, especially Li Zi Wei, came off as selfish at some points and some of their actions and words didn't sit well with me. Huang Yu Xuan's explosiveness(also the comparisons between a 17yo girl and a 27yo woman irked me) , Li Zi Zei's childishness, his inaction (he should've contacted her in the future) and the exaggerated way he treated Chen Yun Ru when he found out Huang Yu Xuan's gone (Chen Yun Ru wasn't perfect but he didn't need to be so rude especially knowing that she was in a fragile state, besides, it's her own body after all).
At first I didn't like Mo Jun Jie, it seemed that he would be the typical second lead in dramas, but in the end I felt that he was the most humane. His actions were level-headed even though they weren't always right. Aditionally, he also told off Li Zi Wei when the damn well needed to be told off.

All in all I feel like the emotional pay-off wasn't really there, I lost the emotional connection. There was this constant feeling of uncertainty about who is who or what they did or what they will do, the crazy serial killer plot felt unecessary, Li Zi Wei died and came back so often it lost its impact...

Nevertheless, I don't fully not recommend this drama. There even were moments, even though that sentiment was eventually proved wrong, where I felt it had the potential to become a 10/10 drama to me. It has a good premise, is aesthetically pleasing, interesting and kept me watching until the end. It was still worth watching.