Pay close attention and you might solve this:

On Monday afternoon, five students at Bayview High walk into detention:
 

• Bronwyn, the brain, is Yale-bound and never breaks a rule

• Addy, the beauty, is the picture-perfect homecoming princess

• Nate, the criminal, is already on probation for dealing

• Cooper, the athlete, is the all-star baseball pitcher

• And Simon, the outcast, is the creator of Bayview High’s
  notorious gossip app

 
Only, Simon never makes it out of that classroom alive. And according to investigators, his death wasn’t an accident. He died on a Monday. But that Tuesday, he’d planned to post juicy reveals about all four of his high-profile classmates. Now, all four of them are suspects in his murder. Are they guilty? Or are they the perfect patsies for a killer who’s still on the loose?
 
They all have a motive. They all have something to hide. They all have a history with Simon. And one of them is definitely lying.