The Deep End of the Ocean (1999)

Family father and entrepreneur Pat does his best to let life go on as best possible after his youngest son Ben is lost in a hotel lobby, presumed kidnapped. His wife Beth however remains obsessed with the case. Vincent's plight worsens ten years later, when a recently moved-in widower's adopted son Sam is identified as Ben, and 'reunited' with a family he doesn't know at all. Yet Sam proves the key to saving Vincent from derailing.—KGF Vissers