Ten unrelated teenagers mysteriously disappeared from their original world overnight. They are strangers to each other but have to depend on each other. They fight for life and for their beliefs in this strange world. They are originally people of the same world, but in this different world where they cannot go back, can they still maintain their original childlike hearts without being dyed black? Perhaps war is the greatest evil, but for the sake of more salvation, war is the most ruthless method. Which one, dawn or light, can bring salvation?