What we've become (featuring zombies)

Isabel thinks the people around her are her true friends, she's known them for years and loves them like brothers and sisters, but when serious danger comes into their lives for the first time it doesn't take much to turn them against her. Their school trip is interrupted by some unexpected guests and there seems to be no way out. As Isabel becomes closer to escaping and finding the truth she must pick who's side she is on and who will live and die.