Director Arthur Harari is determined not to have any fun with the fertile cross-gender body-swap premise of "The Unknown," starring Léa Seydoux.

Niels Schneider also stars in this third feature from Oscar-winning 'Anatomy of a Fall' co-writer Arthur Harari, which fuses existential horror with naturalistic drama.

Director Arthur Harari is determined not to have any fun with the fertile cross-gender body-swap premise of "The Unknown," starring Léa Seydoux.

Cannes film festival: A man is terrified to wake up in Seydoux’s body in this metempsychotic mystery film about gender identity