The body of an unidentified man, wearing jogging gear, is left brain-dead on the steps of the Lille University Hospital. There's no trace of who left him. The only clue: a gray van, spotted on surveillance cameras. On the Invisibles brigade's side, the clues are slim, but they identify the jogger. A bad guy, according to many people. While things are getting tense at Duchesse and Ben's, an IGPN cop arrives to monitor the Invisibles group, who are in the line of fire of the hierarchy... Elsewhere, we discover little Stella, seriously ill. Stella is worried: her father is acting increasingly strange and tense. Besides, what does he do with his days, locked in the annex at the bottom of the garden?
