5 high school graduates mysteriously get a note in there mailbox for a high school prom reunion and they find a door to the basement and decided to explore old memories, the door slams shut they have to find a way out but when they try they find a white bored and flip it over and it says ¨each one of you is hiding something from a other one figure it out before sunrise or it will be leaked to the world to see, now that all trust is betrayed they have to tell each other before daylight comes.