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.
1973
1927
2020
2015
1998
2017
1915
2010
1988
2025
2018
2009
2003
—
2022
