19-year-old Morgane puts her studies on hold and moves to Amsterdam to work as an Au Pair for a French family. Eager to stretch her wings and experience new things, the young girl throws herself into her new job taking care of two young children. But Morgane's parents are worried about their daughter's delicate health and the unforthcoming nature of her beguiling employers. The young girl is rattled by the uneasiness that reigns over the eerie house where the family lives, and soon discovers that their last Au Pair disappeared in strange circumstances. All alone in a foreign land and unable to speak the language, Morgane finds herself sinking into a trap. She'll have to fit together all the pieces of the puzzle fast, to save her own skin.

Capucine, her sick mother and Eugénie hit the road to try to escape the radioactive cloud that is heading straight for their little town.

Candice, a 9 year-old girl, lives alone with her mother after the divorce of her parents. As the little girl's birthday approaches, she starts to see her mother turn into a strange and hideous creature.

Chloé Saint-Laurent is a profiler and works with a police team to solve murders in Paris. She's very sweet, she wears very colored clothes and a huge yellow bag. She looks like a little girl who need a doll, but she's very smart and a very good profiler. Step by step, she fit in the team and her colleagues, very reserved at first, became her best friends.