S1 E1 Episode 1

Lise Stocker, head of the Paris Crime Bureau, returns to her hometown to care for her sick mother. Upon her return, she hears that local teenager, Chloe, has vanished during a local celebration. The mystery disappearance ignites old memories for Lise - fifteen years ago her two best friends, Ana and Marion, disappeared during the very same event. Is there a connection between the two incidents?