Five friends. One anonymous group chat. A secret hidden beneath their school.
Jayden Carter expects another ordinary Tuesday night until a mysterious account named UNKNOWN adds him and his four friends to a group chat.
Then comes a photograph.
It shows the five of them behind their school gym—but someone else is hiding in the reflection.
On the back are four words:
ONE OF YOU IS LYING.
The clues lead Jayden, Maya, Eli, Noah, and Sofia toward a strange silver key, the number 317, a forgotten archive, and a locked door marked 17. Soon they discover that their school has been hiding something for years—and someone is still changing student records in the present.
But UNKNOWN isn't trying to hurt them.
UNKNOWN is trying to lead them somewhere.
As the friends uncover secrets connected to Jayden's older cousin, an old investigation, and a hidden archive beneath the school, they realize they may have been chosen for a reason.
And when they finally catch the person erasing the evidence, they discover the mystery is much bigger than they imagined.
The archive was only the beginning.
Now there's another door.
And someone is already inside.