It's the story of David. He has a girlfriend, Julia, a nice house, an ordinary life. One day, he decided to perform her a wedding proposal. He dresses up and have to buy some flowers. Once done, the decisive moment came.

Louis Pasteur and Robert Koch: great scientists, national icons, opponents in the service of research. One is a Frenchman and chemist and is already in the second half of his life. He is honored worldwide with numerous prizes for his discovery of the rabies vaccine. The other was a still unknown German country doctor in his 30s, whose discovery of the tuberculosis bacillus was later awarded the Nobel Prize for Medicine. From 1881, the two were bitter rivals. Their 20-year rivalry resulted in spectacular progress in the fight against deadly epidemics.

40-year-old Bertrand has been suffering from depression for the last two years and is barely able to keep his head above water. Despite the medication he gulps down all day, every day, and his wife's encouragement, he is unable to find any meaning in his life. Curiously, he will end up finding this sense of purpose at the swimming pool, by joining an all-male synchronised swimming team.