In a city far away, bombs and assassinations shatter lives every day. Yet, even here, hope renews itself, welling up through the rubble. Somewhere in this city, two young people are smiling, hesitating, sharing cheap cigarettes, speaking softly then boldly, falling in love.

As the violence worsens and escape feels ever more necessary, they hear rumour of mysterious black doors appearing all over the city, all over the world. To walk through a door is to find a new life – perhaps in Greece, in London, in California – and to lose the old one for ever . . .

What does it mean to leave your only home behind? Can you belong to many places at once? And when the hour comes and the door stands open before you – will you go?