Case report inspired by the Tidal Model regarding a 45-year-old man with severe psychological suffering on follow-up by Mental Health Services since he was 25 due to a psychotic break. Nursing diagnoses were identified, as well as Expected Outcomes and Specific Interventions, articulated by the NANDA-NOC-NIC terminology, and classified according to the domains stated by the model (self, world, others), as well as according to the three stages of care stated by its authors (immediate, transition and development). After planning and conducting care, there was an assessment and the target score agreed upon was obtained in most of them. Interventions in persons with psychological suffering are necessary in order to improve their quality of life, strengthen their personal autonomy and reduce their isolation. This represents a challenge for Nursing professionals, in order to develop and apply tools of care culturally accessible, such as the Tidal Model.