Humanity is actively exploring space and discovering new worlds. Demetrion is a planet suitable for life and has a lot of resources. A group of colonists emerge from hibernation shortly after arriving on the planet. They remember nothing about their past, but the leaders of the expedition give them instructions and assure them that their memory will soon return. The purpose of the mission is to thoroughly study the soil of Demetrion and, most importantly, the remains of ancient creatures that once inhabited the planet. For some time, the colonists follow the instructions and make some progress, however, their memory does not return. Moreover, after three months it becomes clear that the ancient creatures that the settlers are researching have not become extinct at all and have begun to pose a real threat. The survivors will have to solve the mystery of the planet and find out the true purpose of the expedition.