"There is no way in hell this is happening, Phil. This isn't real." Internet superstars Dan Howell and Phil Lester are awoken in the middle of the night to be told that their close friend and fellow YouTuber PJ Liguori has been killed - just a day after a party held in his own apartment. Only ten people were present at PJ's houseparty - one of them, the culprit. As suspicions arise and secrets surface, Dan and Phil must work together to discover who really killed their best friend.