A group of white-collar workers and others are trapped on the top floor of a 50-floor building. They are given briefcases, one of which contains a card that grants its owner a deposit of life savings: 100 billion dollars and more. However, only one of the briefcases has this prize, and the others are trapped. Opening the wrong briefcase causes the person it is attached to to die. Bombs implanted in their heads will detonate in such situations. There are only a few ways to win: Kill all other participants and access their briefcases to find which one has the card. Find the briefcase key hidden within the building. Open your own briefcase and gamble on it being the right one. Survive for one or two weeks and leave with nothing. However, if a briefcase is not opened after each interval of 10 hours, a random person will have their head detonator go off. Food and water will not be provided during these two weeks. Stay strong and prove your future.

One is hiding from the world. The other is trying to find her place in it. Ellie is perfectly content with her single flat and her Criminal Minds marathon, and a healthy dose of Tumblr nostalgia-until MoonPetal45 enters the chat. As the pressure of her final year mounts, this online stranger becomes her greatest support. Dr. Pembrose knows the rules. As a professor, she should have blocked the charming, accident-prone student the moment she recognised her. But in the quiet of her new home, the line between mentor and admirer is blurring, and Ellie's frequent run-ins with gravity are making the doctor fall a little too hard.

Seven high school students end up getting stuck in a dangerous time loop that starts at midnight and ends when everyone dies, then a new day starts. Will they build new friendships or.. relationships?