The Lost Son is a 1999 crime drama starring French actor Daniel Auteuil and set in London.

The missing man's parents hire Xavier over their daughter's objections, and he quickly finds himself caught up in the underworld of child sex slavery.

He guesses that the lost son is dead and shifts his focus to finding and breaking this lucrative business of child trafficking.

[2] DVD Verdict panned the film, writing "The Lost Son has its heart in the right place, but it fumbles the ball by presenting an idea with great potential in a fairly lackluster package.

"[3] The Herald was mixed in their review, stating that Menges "handles the unpleasant aspects in Eric and Margaret Leclere's script with tact" but that the film had too many unbelievable moments.