30-year-old lawrence is devastated by the sudden loss of his girlfriend Sasha. On a visit to her family in France, he makes a connection with Sasha's sister, Zoe. They share, as best they can, the sorrow and the burden of his absence, between Berlin, Paris, and New York. Three summers, three cities, the time it takes for light to shine again, carried along by the memory of the person they both loved.