In interactive information retrieval (IIR), the interaction between humans and primarily digital information is studied. Meanwhile, computerised virtual reality (VR) continues to evolve on a technical and abstract level. While there has been some research on information retrieval (IR) systems for VR, no research fully encompasses the approach of including human information seeking (IS) behaviour when considering search in VR. This research plan suggests just that. For this, recent existing research is briefly overviewed, and several exploratory studies are proposed. While some existing software artefacts exist, this plan suggests the development of prototypes that allow the analysis of the effects of IR features and the search interface on information seeking in VR. The many choices and challenges regarding the design of these studies are also presented for discussion.