In part one, after crossing the Polish-Ukrainian border against a tide of refugees, David travels to Lviv. The city is tense but relatively peaceful. Buildings and monuments are covered up against attack, and the train station is jammed with refugees. A Russian missile strike soon shatters any illusion of calm. David meets Vika, a refugee who has just fled from Mariupol. She tells her story in a devastating interview. She describes how her world fell apart during the Russian assault: her father injured by shrapnel, and her desperate struggle to survive. David undertakes the perilous journey to Kyiv itself. Travelling by road in a small aid convoy, David finds a ghost town which seems to have been afflicted by ‘an invisible pestilence’. He witnesses the aftermath of Russian strikes; sees civilians still living in underground stations; and visits Maidan Square, site of the bloody 2014 protests against Ukraine’s then pro-Russian government. David’s Ukrainian colleague Olya was there as