Eugene O’Neil’s Long Day’s Journey into Night presents a probing psychological study of a family in crisis. The family finds itself in the midst of a collective trauma:a shared desire for the past. The Tyrones constantly repress and defense their desires, which constitute the family’s dysfunctional relationships. With the psychoanalytic theory of Walter Davis, it demonstrates how the Tyrone’s family traps themselves into an intricate web of conflicts because of the “double” process of desire itself and simultaneously offer solutions according to O’Neil’s own understanding of the family tragedy. The family finds itself in the midst of a collective trauma: a shared desire for the past. The Tyrones constantly repress and defense their desires, which constitute the family’s dysfunctional relationships. With the psychoanalytic theory of Walter Davis, it demonstrates how the Tyrone’s family traps themselves into an intricate web of conflicts because of “double ” process of desire itself and yet offer solutions according to O’Neil’s own understanding of the family tragedy.