Matices tells the story of a renowned and charismatic psychiatrist who gathers six of his patients together at a remote winery to complete their treatment with his famous method, which has achieved a very high cure rate among the most complex and difficult-to-manage patients. After an unusual ceremonial tasting, an unexpected turn of events occurs with a fateful ending. Following the arrival of an astute police inspector who takes over the case, the truth is uncovered about the doctor and his patients' traumas.