5150 Elm's Way (French: 5150, rue des ormes) is a 2009 French-language Canadian psychological thriller drama film directed by Éric Tessier and starring René-Daniel Dubois and Marc-André Grondin.

When Yannick falls from his bike, he knocks on the door of the Beaulieu residence, to call a cab home.

Over time he learns Beaulieu is a righteous psychopath and fanatical chess player who kills drug-dealers, pedophiles and other bad people for a better world.

In the final showdown the two play a chess game in the cellar, where Beaulieu has conserved all of his victims and placed them as pieces on a giant chessboard.

Four months later Yannick is still madly obsessed with the interrupted chess game, so thoroughly consumed by the thought of the final position that he alienates himself from his girlfriend.