It’s summer, on the beach of this little town in Brittany, a man is building a sand castle. A few people watch him. We will be told the story of three of them: a boy, Jumbo, aged 9; François and his sister Zaza. All of them had to deal with the death of somebody they cherished.

After years of estrangement due to difficulties accepting his brother's sexuality, a man diagnosed with a terminal illness decides to reconnect. As the brothers grow closer, their renewed bond starts to alienate their partners, leading to emotional turmoil and strained relationships.