Tony and Emily Hughes’ life changes forever when their five year-old son Oliver goes missing on a family holiday to France.

With Oliver missing and little information to go on, suspicion falls on a known offender living in the area. In the present day, Tony’s attempt to reopen the investigation gathers momentum.

The investigation into Oliver’s disappearance continues. In the present day, Tony and Julien are relieved that the case has now officially been reopened.

The case is thrown into disarray when a key witness is found murdered. In the present day Julien tracks down the dead witnesses’ girlfriend, who has started a new life as a primary school teacher.

Tony and Julien retrace their steps in Paris, as they try and find out the whereabouts of a man who they believe to be intrinsically linked to Oliver’s disappearance.

Tony desperately tries to cover his tracks as he deals with the consequences of his actions. In the present day, Tony and Julien finally track down the man they have been searching for.