Professor Smith has always been every student's favourite teacher. But when Sam and Izzie return to school after the summer holidays, their fun, energetic science teacher is gone. Professor Smith is anxious and when he is kidnapped in front of them, they realise that he was right to be so scared. But what dark secret could their science teacher be hiding? And can Sam and Izzie uncover the truth before their own lives will be put in danger?

Bella and her friends, Elise and Gracie, are going on a school trip. But then they get lost. They set out to find their school friends and the youth hostel where they should be staying but before they can find them, strange and spooky things start to happen. First Bella sees a mysterious girl in the woods, then Elise witnesses a discussion between two men which will reveal some dangerous secrets. Their friends are unaware that they are in danger and it is up to Elise, Bella and Gracie to save them. But how?