The investigation picks up when police find a fingerprint amongst Gabbai's belongings which links to the crime scene of the double murder. But who does the print belong to? Gilou is charged with conspiracy and, in an effort to get him off the hook, Laure goes out of her way to request help from the most unlikely of quarters. Nothing short of a bold move is required. Roban is determined to bring down Tarek Ziani and makes a deal with Ziani's lawyer Joséphine.