This research project creates an undersea restorative chamber for cancer patients and their immediate families, supported by the required medical staff. Submergence addresses the notion of the balance in priorities between support and treatment for cancer patients and their families. The project explores the idea of restoration and recovery of both groups, as the journey to recovery affects not only the patient but the immediate family and friends as well. Investigation has been undertaken into the fields of environmental immersion, mental and physical health and the removal and seclusion from 'normality’. Combining elements of environmental restoration, human bodily health, and a specific ocean interiority, creates new patient-staff connections that are supported both personally and physically. Ultimately aiming to provide a space where the surrounding environment can be utilised as a total immersive experience, Submergence will be a mechanism for the recovery of all inhabitants - both those recovering from cancer, and the key people supporting those patients.