I liked that the plot was picking up speed in order to find the evidence.

When Lee Sang-jae asked if he was trying to threaten Kang Jae-kyung, Hwang Jun-hyun replied that Na Byeong-mo knew, and that Jae-kyung did.
I deduced that they were trying to obtain CCTV footage through the security guard to prove they killed me.

Now that the finale is approaching, I'm really looking forward to seeing how it wraps up!