Narcissistic personality disorder (NPD) is characterized by an intellectualizing narrative style, poor metacognition, maladaptive interpersonal schemas, a restricted set of states of mind, impaired agency and perfectionism. Metacognitive Interpersonal therapy targets these dysfunctions with a series of formalized procedures aimed at first forming a shared formulation of functioning which patients and therapists can then use to plan change. We describe here the core NPD pathology and illustrate the therapy process of a patient with NPD and a somatization disorder. Implications for treatment of NPD are discussed together with a call for empirical testing of therapies for this severe condition.