Pigalle la Nuit

Pigalle la Nuit is a French thriller drama from 2009. If you watched the recent Witnesses (Les Témoins), Catherine Mouchet is also in this one. I'll put this link in here and hopefully it will open in English and not French for you. If not, these pages usually have a translation option on the right side of the IP address window of your browser. 

Pigalle la nuit

If not, here's something else:
"Frenchman Thomas (Jalil Lespert) based in London comes to Paris to secure a deal for his company. In the nightclub "Folies Pigalle", on stage he recognises his sister, as he tries to speak to her, she goes missing. Here is the simple start of this excellent captivating French series. I simply didn't think it could be this good. The story makes perfect use of Pigalle, the Parisien "hot quarter". The story quickly becomes about revenge, territory, redemption. This really is edge of your seat drama."
It appears the link opens in French, but if you use the Chrome browser you can translate it by clicking as shown below.