The young Canut has one uncle who is friends with a fish. The other uncle is friends with a cross. The two uncles and he himself find themselves involved in the dizzying search for the formula of the Chartreuse liqueur, of which the monks have always held custody as their best kept secret. Playing with elements of intrigue and select historical references, Màrius Serra succeeds in transforming the initiating journey of a regular adolescent into a true adventure of meeting and recognition, an intense trajectory in search of the truth.