Devastated by the loss of their son, Joshua, in the tsunami of 2004, Paul (Rufus Sewell) and Jeanne Belhmer (Emmanuelle Béart) have remained in Thailand. Glimpsing a boy who looks like Joshua in video footage from a village of orphaned children on the Thai-Burmese border, Jeanne becomes convinced that her son was kidnapped by traffickers and clings frantically to the hope that he has survived. Unwilling to shatter his wife’s last hope, Paul remains skeptical as she throws their money at a sinister smuggler who promises to take them by boat into pirate-infested waters to find their son. As they continue their quest through the dark jungle, the traumatized couple is pulled into a primeval hell created by their own obsessions and mutual desperation for some sense of closure.