
In Montreal, the unemployed fashion designer Sophie Malaterre is shown a website, switch.com, where it is possible to switch houses with a stranger for vacation. Sophie seeks an apartment in Paris nearby the Eiffel Tower that belongs to Bénédicte Serteaux and they change apartments. Sophie arrives in Paris on Saturday morning. The next morning, policemen break in the apartment and arrest Sophie while she is having a bath. Detective Damien Forgeat interrogates Sophie believing that she is Bénédicte and she learns that a beheaded body was found in her room and all evidence of her life has been deleted.

as Damien Forgeat

as Sophie Malaterre

as Stéphane Defer

as Delors

as Bénédicte Serteaux

as Alice Serteaux

as Verdier

as Claire Marras

as Marianne Malaterre

as Kourosh

as Koskas

as Canadian Inspector

as Inspector Lachaux

as Japanese Girl

as Agathe Huygens

as Père Huygens

as Pat

as Psychiatrist