"Sandra" (Léa Seydoux) is at a crossroads in her life. Her ageing, academic, father (the scene-dominating Pascal Greggory) has been diagnosed with a neuro-degenerative disease that is pretty much robbing him of his quality of life. He is an acclaimed philosopher who finds his increasing lack of ability to think and to remember exasperating. Meantime, she also reconnects with her old friend "Clément" (Melvil Poupaud). He delights in being called a cosmo-chemist (he studies meteoric dust using a rather impressive mass spectrometer). It's clear from the outset that these two have the hots for each...