Sofía es una joven noruega que está a punto de cumplir 15 años. Un día, al regresar del colegio, encuentra en el buzón una nota en la que puede leer: "¿quién eres?" Esta es la primera carta de las muchas que recibe. Así es como la joven comienza un curso de filosofía a distancia impartido por un misterioso profesor, Alberto Knox. Por otro lado, también recibe postales destinadas a una misteriosa muchacha llamada Hilde cuyo remite es Albert Knag, su padre.
ENGLISH DESCRIPTION
One day fourteen-year-old Sophie Amundsen comes home from school to find in her mailbox two notes, with one question on each: "Who are you?" and "Where does the world come from?" From that irresistible beginning, Sophie becomes obsessed with questions that take her far beyond what she knows of her Norwegian village. Through those letters, she enrolls in a kind of correspondence course, covering Socrates to Sartre, with a mysterious philosopher, while receiving letters addressed to another girl. Who is Hilde? And why does her mail keep turning up? To unravel this riddle, Sophie must use the philosophy she is learning—but the truth turns out to be far more complicated than she could have imagined.