The end of civilization has come. We don't know how. A father and his son, a boy, are among the few survivors: their existence, on a stilt house by a lake, is reduced to a struggle for survival. There is no longer any society, any encounter with other men is dangerous. In this regressed world, the father entrusts his thoughts to a notebook, but those words for his son are indecipherable signs. On the death of his father, the boy decides to embark on a journey into the unknown in search of someone who can reveal the meaning of those mysterious pages. Only in this way will he perhaps be able to discover his father's true feelings and a past that he does not know.