A ship that was going to Japan sank, and a boy named Jack got stuck in an island. He lost his family, and when he explores into a forest he encounters many abnormal things he had never seen before. He learns that there is a monster, and decides to fight it. When he is beginning to adjust to the island, he gets a message through his mind. The island he was on is a training system, and he was supposed to be rescued since he finished his training.

However, the system is hacked by a spy in the group, and he is trapped in the island. The government sends another person to rescue him. Jack is not aware of what lies ahead of him…