How, without having worked in a friendly environment, could Nicole’s brother have died of asbestos cancer? Nicole and Gérard, the Voide couple, follow the trail of an old asbestos factory located near their primary school and family home. After years of investigation, they build a solid case, file a complaint and mobilize the inhabitants of the neighborhood to denounce a major environmental poisoning. Based on an unpublished press article, Waterlilies in the lungs chronicles this affair using a small theater of objects. Around a large table on which is placed the map of the Old Country district in Aulnay-Sous-Bois in Seine-Saint-Denis where the events take place, a journalist and two actresses retrace each stage of this investigation in the form of a battle.