Life of mutual death

As soon as Lisa was discovered by the corpse of a German tourist, who became the will of chance her ward, like everything understandable, ordinary life has changed abruptly in every way. The girl suddenly realized that her best friend was deceiving her, and something strange was happening to her relatives. Mom, always cold in the direction of men, fell in love like a girl. And she, Lisa, suddenly discovered relatives, about whom she did not suspect. And what to do with all this when there is no one to trust, and the only person, at the sight of which fear and uncertainty recedes, meets another?
Meanwhile, the investigation of the murder is going on its own and it turns out that the history of the deceased German is rooted in the distant past, when her father, an officer of the Wehrmacht, in occupied Grodno fell in love with a local girl