They are both thirteen years old, they have similar names - Adrien and Adrian - and a whole bunch of common interests: first love, failures at school, difficult relationships with their parents. They discuss all this in correspondence, taking turns throwing letters into mailboxes that one day mysteriously appeared near their houses. And although the boxes are different in color from those to which the boys are accustomed—Adrien is in the city, and Adrian is in his village—the letters regularly reach their recipients. However, with each subsequent letter, the boys begin to feel as if there are a good hundred years between them: Adrian doesn’t know , what kind of word is “cool” and what are sneakers; Adrien does not understand how one can live without a mobile phone and the Internet. However, this does not at all prevent them from understanding each other. After all, the main thing is friendship, which gives strength to cope with any problems... But will it help to escape from the impending war, which Adrian does not even suspect, but Adrien absolutely knows about? Popular French writers Silen Edgar and Paul Beorn, awarded many awards, in including the Gulli TV channel awards, together they wrote this touching story about friendship, love and mutual assistance. The story of two friends is both fantastic and historically reliable. Previously, Compass Guide also published the historical story “42 Days” by Silene Edgar.