Matteo, Jeremy's boss, has just been kidnapped by the killer. A race against time begins to save him. Faced with the killer, Sterenn tries to convince him to spare Matteo... in vain. Arrested, the killer refuses to speak. Except on Sterenn, on whom he imposes a diabolical pact...

While the pact with the killer is still running, Lyes manages to convince the Valais police that Sterenn is covering up for her son and the homicide he committed. Sterenn and Jeremy are arrested. But Sterenn manages to escape...