Department S

A gangster in Rome gives a small package to his accomplice, with instructions to deliver it to a man in Paris, and is killed soon after in a shooting. The courier, instead of delivering the package, opens it and finds some flowers and a cryptic message, which he is unable to make sense of. As it turns out, he is not the only one trying to decipher the meaning. The people who killed the other gangster are after the package and its contents too.

The Department, called in after the shooting, follow the courier to Paris and realize he hasn't delivered the package yet. So Stewart poses as the courier to lure out the intended recipient, and indeed makes contact... but now is expected to deliver the package that he doesn't have in his possession. Meanwhile, Jason and Annabelle are trying to find the real courier and get a hold of the package so that Stewart can 'deliver' it and see where it leads them, but time is running out, and Annabelle has some serious code cracking to do...