Each episode features a mathematician speaking from their office or laboratory about a mathematical topic close to their heart. Scripted, edited and illustrated with short animations, the videos are neither interviews nor lectures; they aim to retain a fairly natural tone and be accessible to as many people as possible. After featuring Viviane Pons of Université Paris Saclay, Frédéric Le Roux of Sorbonne Université and Aline Parreau of Université de Lyon, Myriogon returns with Sylvie Benzoni-Gavage, director of the Institut Henri-Poincaré, who takes a clever look at the topology of the Rulpidon, a sculpture by artist Ulysse Lacoste that can be admired in the gardens of the Maison Poincaré.