Hide and Seek Book 1: Book of the Urban Legend

This starts with a group of young teens around the age of 13, goes into one school. But there are secrets about themselves but they didn't know about. Katherine Espiritu, Alexandria Andoy, Christiana Tejero, Allyssa Lagoy, Mark Japhet Jumao-as, Criz Ian Gutierrez and Bryan Villasis. They're possed with different powers.
But one day, Katherine, Bryan, Alexandria and Christiana came into an old warehouse and unfortunately they discovered their powers. And at the same time, they knew that, it was not humans they're fighting the whole time. Bryan said it was a spirits that came from hell.
But someone watches their daily lives.
But later on, Kristine Elaine joins the group. But they didn't know what is her real identity.
Is she a friend or a foe?
But they still trusted her. And they knew that she has one of the legendary swords.
But they need to find the lost princess, emperor's son and the legendary slayer.

What will happen next?