Children of the northern lights

After the accident, Yegor does not remember who he is and where he is. He comes to his senses in a strange school located in an old castle on the island of the northern lights. Both the island and the school are full of secrets and riddles. Why does none of the students remember their past? Why do some guys disappear from school, and then appear again, but do not remember where they were all this time? Why does a long -abandoned lighthouse work at times, and to whom does he send signals? Finally, why are the runes light up in the ancient ruins in the forest, if one of the guys is only approaching them? Egor and his new friends are looking for answers to these questions and gradually understand that they were far from accidental on the island