The fuzzy front end is the critical initial step of an innovation process during which new ideas emerge. This step's functioning is well understood when the ideas produced are in line with the organisation's directions or roadmap. In that case, there are a variety of managerial methods available to guide, filter and control the development of ideas while reducing the associated risks. However, we know considerably less about the emergence and development of orphan ideas, that is ideas that are not aligned with the firm's strategic roadmap. Such orphan ideas are beyond the scope of managers because they are not consistent with the orientations and needs identified by the firm. The aim of this article is to start to fill this gap through the qualitative study of three unexpected ideation processes at Hydro‐Québec's research institute. Our data reveal a process characterised by a complicated intertwinement of formal and informal mechanisms and relationships. In particular, our results show that informal groups, which can be assimilated to epistemic communities, play a major role in the orchestration of the first stages of the journey of orphan ideas by taking charge of the development of the value proposition and of the idea's integration in the firm's managerial and strategic framework. Further, managing orphan ideas requires specific managerial devices and social mechanisms.