Arun Joshi gives a new dimension to the genre of Indian Fiction in English by introducing the theme of existentialism in his novels. He has successfully revealed the priorities of contemporary Indian life and social ethos. His characters suffer from quest for identity, conflict, and personal suffering. But ultimately there is rejuvenation and enlightenment from the shadow of darkness by the arrival of the light in the form of knowledge. The novel, “The Foreigner” centers round the different aspects of human realities and brings out the vivacity of longing, the pain of detachment and above all the mystic realities of life. The central character of the story, Sindi Oberoi revolves around his loneliness, anguish and anxiety born of his detachment from his environment, tradition, and self. He sees himself as a stranger wherever he lives or goes. Eventually, all his sufferings are just like a purging agent that helps him to shift from detachment to involvement, where he realizes the freedom of body and soul. Key-words: existentialism, freedom of body and soul, mystic realities of life etc.