"The Shadow Line" is a novel by Joseph Conrad that explores the transition from youth to adulthood through the experiences of its protagonist, an unnamed young man. The story follows his journey as he takes on a leadership role in a trading ship, confronting the challenges of responsibility, morality, and the complexities of human nature. Set against the backdrop of the sea, the narrative delves into themes of identity, fear, and the struggle between good and evil. The protagonist's encounters with various characters highlight the blurred lines between innocence and experience, ultimately leading to a profound personal transformation.