This paper describes a narrative group therapy model applied in a psychiatric day centre. The group was conceived as a form of definitional ceremony, in which a participant is invited to share an account of a unique outcome that happened to them recently, while the other members serve as outsider witnesses to this development. A detailed example of a therapeutic conversation about depression, and the outsider witness group’s responses, shows how these generative conversations can be held in a psychiatric setting. A second example of this work details how outsider witness group reflections can be used to form the basis of an alternative kind of ‘discharge letter’. Finally, the paper discusses significant dilemmas arising from the work, including how to discern which subordinate story-lines to develop from the many entry points available.