Set on a single street in South London, Capital is a portrait of a road transformed by soaring property prices: what was once the home of modest lower-middle class families, Pepys Road has been continuously gentrified into a street of multimillion pound houses. 

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The denizens of Pepys Road include investment banker Roger (Toby Jones), rubbing his hands in anticipation of his £1m bonus; his spendthrift wife Arabella (Rachael Stirling); Polish builder Bogdan (Radoslaw Kaim), who has come from Warsaw to indulge the rich in their interior decoration whims; Quentina, the Zimbabwean refugee with a PhD, working as a traffic warden (Wunmi Mosaku); local newsagent Ahmed (Adeel Akhtar); and OAP Petunia (Gemma Jones), who has lived her entire life on Pepys Road and who is now contemplating death in the house in which she was born.

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One day, the street’s residents all receive an anonymous postcard through their front doors bearing a simple message: 'We Want What You Have'. Who is behind the anonymous hate campaign? And what do they want?