Following the death of his twin sister, Gaspard, a young music teacher, brings together his five former best friends in their deserted childhood school, in the middle of July.
After meeting at a party, Isaac and Ava spend the night walking in the cold Parisian winter and fall in love without even realizing it. But Ava has to go to Brazil the next day. As he waits for her alone, Isaac learns that Ava's plane has gone missing.
