Le Pont du Nord (1981)

Marie is just out from prison when she runs into Baptiste, a young paranoid needing companionship. In their pursuit of a mysterious briefcase carried by Marie's former lover, they roam the street of Paris, transformed into a giant board game, a maze spotted with mysterious traps, puzzling clues, and chance encounters. Maybe they are bricks in some sinister scheme, maybe they are playing a board game, maybe it's a fairy tale, maybe it's yet something else...