(No spoilers for this paragraph)
12 high school girls are locked in a room and left to find out why and who locked them in. They decide to delve into their high school history and we learn about some dark secrets the students had which shed light into their capture.
My review in sum: this captured my attention enough to get me to finish it. But I regret that it did.
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(Mild spoilers ahead)
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I agree with some reviews that the pacing was sometimes good enough to keep me roped in. However, a lot of the time it was dragged out or very rushed. The plot had some very loose ends.
I won't nitpick at the "holes" some people have mentioned because that didn't bother me as much as the pacing and some of the writing - especially how the series ended. I was left disappointed and slightly empty by the ending. This point essentially means I wouldn't recommend this show to people.
I will nitpick something and say that I wish there wasn't as much screaming. Some of the girl's reactions to the horrors in the room were either over dramatic or very drawn out. It made for unnecessarily long and hard to watch scenes.
There were also a lot of padding. Some episodes could have been shorter. This damaged the quality of the narration in this story. We learn about the girl's live almost purely from dialogue as we don't get to actually watch how most stories played out with our eyes. This in itself isn't bad. It could have just been done better. The extended bickering and arguing made me zone out sometimes out of disinterest. And so, it was difficult for me to notice when the girl's went into the story again.
So yeah, this is essentially what I mean by good premise but bad execution. Wouldn't really recommend.