I gave up trying to make sense of all the threads. Similar series that weave different timelines and hypotheticals played out in real life, use different color schemes or blurred screen edges. This is so confusing to follow, despite the dates designating the past, there are scenarios being played out that don't fit in the "present" timeline and what is real and what is a fictional trial or the things that happened leading up to that trial - or someone's imagination of what could have happened - it's a mess.

At some point a convicted criminal that served out his sentence is questioning the male lead, who's also under suspicion with police watching the scene. Why would that happen? Was it also a hypothetical? Is this a custom in Korean interrogation?

If you can make sense of how it's portraid, then it probably is worth the watch, because I do like how the male lead is obviously framed for a murder, with almost no way out.