A small lake is hidden on one of the many islands of the White Sea. Behind the seeming silence and peace lurks a whole world of living creatures, full of passion, trials and tragedies! Unusual, hollow-nesting ducks - Goldeneyes - breed their offspring here. This cinema surveillance will reveal the spectacular stories from the lives of these birds and their closest neighbors. Biologists will tell what discoveries can be done while studying the unpredictable world of the lake in the sea.