A change in command raises new questions. As Agathe begins to suspect his motives, Ludo realizes the killer may be closer than he thought - much closer.
In the past, Mélanie takes matters into her own hands. Forced to step back from the case after his gaffe with a suspect, Ludo goes home to a nightmare.
When a woman is found dead on the same beach where his wife died 27 years earlier, Ludo stumbles upon a space-time rift with unimaginable consequences.