A burning fishing boat found on the Channel turns into a new case for Karl and Elise in the third and final chapter of the series.

A shocking discovery is made at an immigration removal centre alongside a sinister animation containing a hidden message.

As a young mother-to-be helps Karl and Elise with their enquiries a new development threatens to tear the pair's partnership apart.

Karl makes a foreboding discovery at Elise’s apartment, and the pattern of missing people continues.

In the final episode, Karl and Elise face a tense and gripping showdown with the Pied Piper, while the truth about the Moreau abduction is revealed at last.