A young man receives a series of letters engraved with the symbol of a snake eating its own tail. Inside them are an impossible photograph, a key and the name of a street. To reach the end of the mystery, he will first have to discover its origin.
1922
2014
—
2011
1940
2021
2006
1986
2020
2022
2019
2023
2013
1985
2015
