1940, Italy. Lili and Esti have been best friends since they first met at university. When Esti's son Theo is born, they become as close as sisters. While a war seethes across borders, life somehow goes on--until Germany invades Italy, and the friends suddenly find themselves in occupied territory.

Esti, older and fiercely self-assured, convinces Lili to join the resistance efforts. But when disaster strikes, a critically wounded Esti asks Lili to take a much bigger step: To go on the run with Theo. Protect him while Esti can't.

Terrified to travel on her own, Lili sets out with Theo on a journey to reach Allied territory, braving Nazi-occupied villages and bombed-out cities, doing everything she can to keep him safe.

A remarkable tale of friendship, romance, motherhood, and survival, One Good Thing reminds us what is worth fighting for--and that love can bloom even in the darkest of moments.