A delightful blend of coincidence and destiny, Just to Be Sure explores the virtues and vagaries of DNA in warm, funny, and unpredictable ways that leave you rooting for nurture over nature with all your heart.

Erwin, a wistful widower of 45, makes a living clearing buried mines left over from WWII. While undergoing genetic testing with his single, pregnant daughter, Erwin discovers he has no genetic connection to his own father, also a widower. A private detective helps him track down his biological father, Joseph, who is ailing as he ages. As Erwin and Joseph embark on a tentative and endearing relationship, Erwin also begins what might be a romantic affair with Anna, a local doctor in Joseph’s seaside town. But questions of identity and lineage bring endless twists and turns in this perceptive French comedy.

Just to Be Sure traverses minefields—literal and figurative—in search of what actually makes us who we are: biology or something else.