A story about one of the hard days of WWII based on the novel by Vasiliy Bykov.

Several children go on a lifelong space mission to Cassiopeia because they don't want to go to school.

In the 23rd century, a reconnaissance craft discovers an unknown destroyed spaceship in deep recesses of space. The crew discovers the sole survivor - the mysterious Niya, an artificial being who appears to be the last of her kind, who possesses unique and unimaginable powers. Taken in by a family of scientists to unlock her memories and harness her abilities, a journey to discover Niya’s origins begins - taking us through the stars from Earth, to a dying planet light years away in need of help…

During the German occupation, Belarusian teacher Ales Moroz does not abandon his students, instilling in them a sense of determination and courage. One day, the students disobey their teacher and decide to avenge their parents. As a result of a failed attempt on the lives of Nazi henchmen, the children are taken prisoner. Unable to find support from the partisans, Ales decides to share the fate of his students and surrenders to the enemy, which after the war is considered treason. Only one of his students, Pavel Miklashevich, miraculously survives until Victory Day. Continuing his teacher's work, Pavel devotes his life to restoring the good name of Ales Moroz.