Julien is searching for missing sex worker Natalie Rose. He meets Edward, Natalie's uncle, and the two men delve into the criminal underworld of Amsterdam's red light district.

Natalie reveals the full shocking truth about Edward and Julien has to tread carefully. When tragedy strikes, Julien becomes determined to uncover Edward’s true motives.

Julien confronts Edward and has to take drastic action to protect his family. But a personal bombshell forces Julien to face some secrets from his own past.

Julien goes in pursuit of the money whilst Genevieve coerces Edward to meet Constantin. However, Edward makes a reckless move that puts the entire case in jeopardy.

As Julien and Genevieve outmanoeuvre Constantin, the Brigada make their own move and as Julien uncovers their inside source things lead to a dramatic conclusion.

Julien Baptiste travels to Hungary to help the British ambassador, Emma Chambers, find her missing family. When a body is found, the pressure is on to save Emma’s two sons.

Julien and Zsofia track down the tattooed man but he gives little away. Things escalate when the police receive a hostage video, and Emma takes drastic action for her family.

As Julien and Zsofia investigate Far Right politician Kamilla Agoston, Emma finds a lead on Alex’s computer that takes her and Julien to a shocking and bloody discovery.

With Alex dead Emma’s only hope is to find her other son Will. And when Julien and Zsofia look to Kamilla and her husband, a new lead is uncovered and a dramatic discovery is made

Reeling from Will’s escape, Emma and Julien must do everything they can to stop the next attack. If they can follow the clues and find Will, perhaps they can succeed.