The lives of three families intersect in the hallways of an apartment block in a Montreal neighborhood. Melissa, Roxane, and Kevin have never had it easy. As their parents face their own struggles--with addiction, unemployment, and abuse--they must learn to fend for themselves. Though their lives converge at school, on the street, at the corner store, or when they can hear each other through their apartments' thin walls, they each feel deeply alone. Neighbourhood Watch tells their coming-of-age stories with a cinematic ease, moving between despair and the unalterable hope of childhood.