"Sininen päiväkirja" by Lev Lvovich Tolstoy is a novel written in the late 19th century. The book centers around the character Wasilij Nikolajevitsh, a passionate and lively young man who navigates the complexities of life, science, and personal relationships in Moscow, particularly drawn into discussions about the nature of human desires and societal values during his interactions with friends and fellow students. The opening of the narrative introduces Wasilij Nikolajevitsh and hisintellectual pursuits after graduating from the natural sciences faculty. He enjoys music and life, often engaging in deep discussions with his peers, particularly focusing on the moral ailment of sensuality in society. During a gathering at his residence, he passionately argues that this sensuality is a blight affecting all people, igniting a spirited debate among his friends, which reveals his convictions about the human condition. As the gathering continues, Wasilij shares a poignant tale of a fellow student who succumbed to this very ailment, foreshadowing the personal dilemmas that may arise as the story unfolds. (This is an automatically generated summary.)