During the subsequent siege and assault, as bombs fall, inhabitants flee, and access to electricity, food, water, and medicine are severed, the team — the only international journalists left — struggles to cover the war atrocities and to transmit their footage out. Eventually surrounded by Russian soldiers, they shelter in a hospital, unsure of how they'll escape.

Ukrainian filmmaker and journalist Mstyslav Chernov offers a window into the practices of conflict zone reporters and an unflinching, anguishing account of the 20 days he and colleagues Evgeniy Maloletka and Vasilisa Stepanenko spent covering Mariupol.

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