As Sarah (Eva Green) puts her daughter Stella (Zélie Boulant) to bed, they go through the motions of their routine. ‘First degree of separation’, the mother says before kissing Stella on the cheek. “Second degree of separation”, the daughter chimes back before Sarah goes in for another peck. If you look up the word ‘proximal’ in the dictionary you’ll see it defined as ‘situated close to’ or ‘nearest the point of attachment’ – but as it turns out, Alice Winocour’s Proxima is all about letting go.