Lionel is confused. There's a rumour going around that one of his great-grandfathers was not Swiss, but a mysterious Pole. The family doesn't seem to care, but Lionel, suffering an identity crisis, develops an obsession with a Polish illegal immigrant woman, to the point of jeopardizing his gay relationship with Serge. Resolved to get to the bottom of the mystery, Lionel accompanied by his sister Lucie, decides to go find out about Poland for himself. But do Lionel and Lucie really want information on an obscure ancestor, or do they just want to get away from it all? Everything seems possible in this wild quest for identity.