Aurelie has discovered that her son Jerome owes 50,000 euros to a dealer and has no way of settling this debt. She decides to embezzle a stock of UBH that she was supposed to destroy, but is unmasked by the IGPN. Max then makes a contract with her: if Aurelie accepts the infiltration mission, justice is ready to forgive the crime and Max will take care of settling Jeremie's problem with his dealer. Aurelie has no choice but to accept and soon finds herself in contact with Richard Le Moal, a UBH dealer who was identified by Max and his team.