This work studies a modality of health care called therapeutic monitoring, which is an important tool for the treatment of psychotic subjects and useful for Psychiatric Reform. The OT setting is studied in order to establish a possible relationship between the psychoanalytic concepts and the singularities that this modality proposes, problematizing them through the following concepts: device, chance / event and city. Some answers are sought to the following questions: How is a relationship established that promotes the appearance of a meeting between a companion and a companion? In therapeutic follow-up, how could we think about starting treatment? What actually happens or needs to happen? What does this mean from the point of view of psychoanalysis and considering that we are working with psychotic subjects? What is the workspace, or better said, the TA setting? What concepts are at stake in this setting. Can we rely on Freudian discoveries even though the setting is known to be different? What problems does this cause from a technical point of view? The methodology is a single case study. Records of attendance, interviews and written material produced by the subject himself are used as a source. Scenes illustrating the case were chosen, linking them to the presented theorization. Therapeutic accompaniment is understood as an important clinical and political device in the Psychiatric Reform process. The therapeutic companion is an agent that transits between the treatment spaces (the inside) and the other social spaces (the outside) with a deinstitutionalizing vision and with the objective of helping the subjects to reframe their social place.