Dir: Olivier Assayas; Starring: Kristen Stewart, Nora von Waldstätten, Sigrid Bouaziz, Lars Eidinger, Ty Olwin. 15 cert, 105 mins

“A woman runs from a killer and hides.” That’s the reason given by Maureen (Kristen Stewart), the title character of Olivier Assayas’s Personal Shopper, when an anonymous texter asks her why horror films scare her. And as her fingers flit across the screen of her iPhone, she seems to get more scared with every tap.

Maureen is a celebrity PA who’s travelling by Eurostar from Paris to London, where she’s due to pick up the latest bale of couture for her employer, a spoiled starlet called Kyra (Nora von Waldstätten). But since her arrival at the Gare du Nord that morning, messages have been appearing on her phone from an unknown sender who seems to be watching her.