Ritz Towers is a luxury tower block so exclusive not even aliens can get a place there. Mr Colchester has somehow secured a flat at the Ritz. With the streets increasingly troubled, his husband feels safe there. The problem is that Ritz Towers is anything but safe.

For a start, the building has more tenants than it has flats. Then there are the endless dinner parties. The whole new definition of upwardly mobile. And finally, there is the very mysterious caretaker.