Once a well-to-do country house, Little Egypt is now derelict and trapped between a railway, a dual carriageway and a superstore, and although it looks deserted it isn't. Nonagenarian twins, Isis and Osiris, still live in the home they were born in, and from which in the 1920's their obsessive Egyptologist parents left them to search for the fabled tomb of Herihor - and never returned. Isis and Osiris have stayed in the house, guarding a terrible secret until a chance meeting between Isis and young anarchist Spike, sparks an unlikely friendship and proves a catalyst for change.