Our clinical practice in penal institutions brings us face to face with the characteristics of prison space-time. This institutional reality influences the therapeutic framework and has effects on the psychic functioning of incarcerated people. Although patient profiles are heterogeneous, the body is a central dimension in many of their problems. What cannot be thought or said is expressed and acted upon through the body, as we shall see from our encounter with Paul. This clinic of actions corresponds to a psychic reality that is complex to grasp and requires therapeutic adjustments. Our reflection thus leads us to an essential question: what kind of therapeutic support can be offered to this population? Hypnosis, a mind-body approach in which the therapeutic relationship is essential, seems to us to be extremely rich. This therapy opens the way to the imaginary, enabling us to set in motion realities that are sometimes too rigid. We illustrate this process of shifting the balance between the imaginary and reality through our therapeutic work with Rémy, repeatedly incarcerated for sexual violence. By enabling Remy to experiment with multiple realities, hypnosis revived a process of psychic reworking.