Maybe yes, maybe no.

Ariane lives with Simon in his large Paris flat. Simon is obsessed with her: he wants to know everything about her, secretly follows her when she goes out, asks questions all the time, even in the most intimate moments. Ariane seems to take it all in stride, but Simon realises that she's hiding something.

In 1850, on the isolated French island of Saint-Pierre, a murder shocks the natives. Two fishermen are arrested. One of them, Louis Ollivier, dies in custody. The other, Neel Auguste, is sentenced to death by the guillotine. The island is so small that it has neither a guillotine nor an executioner. While those are sent for Auguste is placed under the supervision of an army Captain.

Two people meet each other after missing the last train home, leading to a beautiful relationship over five years.