Arson, accident or murder? After a fire rips through a North London tower block, two bodies are found locked in an 11th floor flat. But it's the third victim that ensures the presence of detective Maeve Kerrigan and the murder squad. It appears that controversial MP Geoff Armstrong, trapped by the fire, chose to jump to his death rather than wait for rescue.

But what was such a right-wing politician doing in the deprived, culturally diverse Maudling Estate?

As Maeve and her senior colleague, Derwent, pick through the wreckage, they uncover the secret world of the 11th floor, where everyone seems to have something to hide….