The Secrets of Hallowed Saint Yerith's

Five children.
A lost son that no one is looking for.
One witness to a terrible secret, a horrible monster.
No one believes them.
When teachers do not believe you, you must be the one to keep yourself and others safe. Never mind your destiny.
***
The Saint Yerith's Arcane Institute has been a beacon of education for years- in the whole world, it ranks as one of the Hallowed Five. In its latest year group of newcomers, of all the members of royalty and gifted arcanists from all over Tertraelum, five accidental detention attendees are called to action to discover the truth of the disappearance of another in member of after class detention. As they delve deeper into the haunted halls of Saint Yerith's, they will soon come to realise that there are some things this hallowed academy is desperate to keep buried.
Of the five gifted arcanists called to action, including:
• A stoic orc lost in a foreign school
• The son of a duchess who is coming to school and bracing for the worst
• A changeling who only ever wanted to leave her hollow
• A boy born with great arcane gifts here to do his mother proud
• A young soon-to-be duchess with no plans to fight the flow of her life, no matter where it goes
None of them had planned for this. They're all fourteen, why would they?