Between his friends and the family business, Arnaud's summer looks set to be a peaceful one. Peaceful until he runs into Madeleine, as beautiful as she is brusque, a concrete block of tensed muscles and doomsday prophecies. He expects nothing; she prepares for the worst. He takes things as they come, likes a good laugh. She fights, runs, swims, pushes herself to the limit. Given she hasn't asked him for anything, just how far will he go along with...

In the early 1990s, Act Up-Paris activists advocate for those stricken with HIV/AIDS with a literal life-or-death urgency. Amid rallies, fierce debates and ecstatic dance parties, newcomer Nathan falls in love with Act Up's radical leader.

On a sweltering day in the south of France, four characters find themselves on a collision course that ends in tragedy.