In a Belgian village during the start of World War I, the Lambert family finds themselves thrust into the heart of the conflict in The Last Front. Leonard Lambert, a devoted husband and father, grapples with protecting his family as German forces advance to their village. Amidst the war, a tender love story blossoms between Adrien Lambert, Leonard's son, and Louise Janssen, a local villager.

A game of chess in 1973 reignites the two players' vivid memories of their fateful meeting during the visceral Great War of 1914.