Ten people woke up in an abandoned hotel, the bracelets on their wrists dancing with the same countdown - ten days.
"At the end of ten days, no one will be spared."
The rules say that one can survive by finding the key, but the deceased says that the key is a trap. The reservoir collapse ten years ago, the girl who was afraid of water, old photos of the engineering team... The forgotten sins fermented in every room.
What's even more frightening is that there is always an "eighth person" hiding in the dark, using rules and death to force them to remember: Who is the perpetrator? Who are the Avengers?
When the countdown reaches zero, will the survivors be those who remember the tide, or those who will be swallowed by the tide?
