Salt for the Sea.

The story is about a fourteen-year-old girl Lisa, who is forced to move with her parents to a small town by the sea because she inadvertently becomes a participant in the senseless death of a classmate due to a dangerous children's game. In the absence of like-minded friends, Lisa loses meaning and thirst for life, and later finds a friend on the social network under the strange nickname White Whale and decides to commit suicide with him as a challenge to the intolerance of their lives. Based on Anastasia Nikulina's novel Salt for the Sea, or the White Whale.