Миграция

Polar terns migrate annually from Greenland to Antarctica. That is their nature. 
There are people whom nature has also made wanderers — they leave at the call of distant seas and lands, leaving those who love them to struggle with irresistible longing. 
Neither humans nor birds are given to know what awaits them at the end — beyond the edge of eternal ice,
where a terrible loss may turn into the most precious gain. And yet they strive toward a finite goal, no matter what obstacles may arise along the way. 
Even if this migration is their last.