The first grey hair appeared on a Tuesday morning, four months and twenty-seven days after her arrival. Mira was brushing her teeth—the same activity she had performed every morning for five months now, standing at the communal bathroom sink with the lukewarm water running over her fingers and the fluorescent light humming its eternal hum above her head—when she noticed it. A single strand, bright silver against the brown of the rest, emerging from the left side of her head near the temple. She...