Melting snow reveals a woman's body. Her murder seems to have macabre aspects. Sterenn Peiry is put in charge of the case but crosses ethical boundaries to help her son, Jérémy.
A race against the clock begins when the serial killer resorts to kidnapping. Sterenn tries to convince the killer to spare his victim's life. Where will this end?
Sterenn has only hours left to honour the pact if she wants to save her son. Lyes is convinced that Mélinda is not one of the serial killer's victims. So who killed her?
