365: Repeat The Year is an awesome thriller!
It has a number of flaws here and there, and there is one burning question I am left with at the end, but despite that, I still fully recommend it.
Now, on to some SPOILERS...
The group "resets" back a year at one exact time and place. After the reset, they make different decisions to improve their life, and there are of course some butterfly effects that cause unintended results. But somehow, the things that the previous resetter (aka Lee Shin, who invited them to reset together this time round) knows are unchanged, for example the date and time of death for each of them.
The plot is that Lee Shin had already reset several times in the past (the reason for this is kept "secret" till close to the end, but it was easy to guess that she was resetting for her daughter who dies a bit before the reset), and the other resetters are people who were fated to die that year. But on the previous reset, she saved their lives, and then invited them to reset together. (Why? For "fun" so that reliving the same year wouldn't be boring. But to me, that reason is weak...)
Initially I thought that these people had something to do with her daughter's death, and she was resetting until her daughter manages to live somehow. To me, that would have been a more plausible reason. But somehow it wasn't the reason, and when they reveal the actual person behind the reset, it is Prof Hwang, who had pretended to be one of the invited resetters with the others. And Prof Hwang's reason is exactly that: to have "fun". It makes more sense for him though...because he is an old man who might just want to have fun living...while Lee Shin just wants to spend time with her daughter.
But there is a discrepancy here where Lee Shin suddenly says that she doesn't know how to reset, and only Prof Hwang knows. But earlier there had been a scene where she was driving her car to a cliff to commit suicide, but wakes up in her body a year ago (which is how they reset). Supposedly this was how she discovered how to reset. This scene was not even where she was talking (aka lying) to someone, but just her thoughts. So it did not make sense for her to be talking about something fake. I wonder whether they initially wanted Lee Shin to be the sole mastermind, and then decided to add Prof Hwang to stir things up. They revealed Prof Hwang quite close to the end...
So Lee Shin is protecting Prof Hwang so that he can help her reset after her daughter dies, and suddenly we see that Prof Hwang actually tries to inject Lee Shin's daughter with something. In this reset, Ga Hyeon (female lead character) catches his minion in the act and saves Lee Shin's daughter. They say that Prof Hwang had been killing Lee Shin's daughter every year because he needed her to reset with him. But here's the thing..why would he need her? This part makes no sense. In the end, Prof Hwang even reset by himself...which simply proves that killing Lee Shin's daughter was totally unnecessary. This is my biggest question...the other flaws can probably be explained away by the fact that they were needed to keep the plot going...but this was totally unnecessary! The daughter could have died naturally just as her mother thought! (she had a disease, so it would not be totally "natural", but she didn't need to be killed...)
Another thing that didn't make sense was how the killer still tries to kill the two leads in the end. Prof Hwang had told the killer that he would let him reset together. So all the killer had to do was lie low until the reset date (why it's only one date, I have no idea...) and then he could go back one year and be careful not to get caught. But here he was an escapee and he still risks getting caught by going back to kill them, on exactly the same date as before (which is ridiculous! So many different things have happened, and your revenge date is still the same?). Plus the killer is actually close to Hyeong Ju (the male lead character) and was supposed to not really want to kill him.
But the storyline was still amazing, so I absolutely enjoyed the ride :D