Post-stroke depression is the most common neuropsychiatric complication of stroke, and can occur early too late after stroke. However, having depression as an isolated clinical manifestation of stroke is extremely rare in the literature. We report the case of an ischemic vascular accident revealed by sudden onset depression in a 59-year-old female patient. On the basis of this report and a review of the literature we discuss the different hypotheses that may explain the underlying mechanisms.