Saving Lisa

On a new assignment, Rose develops feelings for one of her students, Lisa.; Rose discovers she is being abused at home and attempts to notify social services, but no one, not even her partner Mehdi, appears to be concerned about Lisa's situation.

After arriving in Bordeaux with Lisa, Rose reunites with her adoptive mother, Diane and her sisters, Garance and Mélanie, whom she has not seen for ten years.

Garance and Melanie discover the existence of Lisa, who calls herself Charlotte, and whom Rose misstates as her daughter; Isabel resists Daniel's advances as best she can; in Saint-Nazaire, Baranski and Valin discover that Lisa has been kidnapped.

Determined to get her daughter back, Julie bursts into Isabel's house; Garance learns that it was Rose who kidnapped the girl wanted by the police in Saint-Nazaire; Greg intends to retrieve the drugs he hid in Lisa's blanket.

After Greg kidnaps Lisa, Rose and Mehdi try to track him down; Julie discovers a shocking truth; the police brigade immediately leaves for Bordeaux; Rose must make a life-changing decision.

Hunted by the police, Rose, Medhi and Lisa find brief refuge in an abandoned fortress, but they are quickly surrounded by the police. Rose gets arrested while Lisa is placed in a home.