Seven strangers with different identities woke up in a confined space and were involved in a death game called "Seven Days in the Cage." The cold rules on the electronic screen declare: The "key" hidden among them must be found within seven days, otherwise one person will be randomly "cleared" at midnight every day.
In the rusty room, suspicion grew like vines. The secrets in the pocket of the programmer Chen Mo, the inexplicable fear of the school uniform girl Li Xue towards Lao Zhou, the violence of the strong man Zhao Qiang, the calm examination of the workplace woman Zhang Lan, the enamel cup that the old man Wang Decai clings to... Everyone has an ulterior past, and the truth of the "key" is far more bizarre than imagined.
Exclusive tasks that suddenly pop up on personal terminals tear apart the already tense relationship even more - some people need to expose lies, some people need to protect a specific object, and some people must stick to a certain object. When the copper box was dug out from under the floor and the hexagonal key quietly appeared, they were shocked to realize that the stakes in this game had never been survival, but the sins that were forcibly buried for everyone.
Trust is a fatal trap, truth is a death charm. The seven-day countdown has started. Are they looking for the key, or are they heading towards their own grave step by step?
