The Creatures Mark

It was just another day at school when it all started. No one knew what was happening when they called everyone to the gym. Or why everyone was frozen. When a creature attacked us. Or why we were the only ones that didn't have the mark. Read about how a group of friends tries to survive multiple different types, from giving them one mark. The creatures mark. But if they are locked in a school, how will they escape? And solve the mystery, of the mark.